| 1 | //! Tool and types for requesting user input via the TUI. |
| 2 | |
| 3 | use super::spec::{ |
| 4 | ApprovalRequirement, ToolCapability, ToolContext, ToolError, ToolResult, ToolSpec, |
| 5 | }; |
| 6 | use async_trait::async_trait; |
| 7 | use serde::{Deserialize, Serialize}; |
| 8 | use serde_json::{Value, json}; |
| 9 | |
| 10 | /// Default ceiling on `request_user_input.questions` (#5949). Raised from the |
| 11 | /// former hard-coded 3 so research/planning turns that need four or more |
| 12 | /// clarifications are not rejected outright. |
| 13 | pub const DEFAULT_MAX_QUESTIONS: usize = 6; |
| 14 | /// Default ceiling on options per question. |
| 15 | pub const DEFAULT_MAX_OPTIONS: usize = 4; |
| 16 | /// Inclusive bounds a configured `user_input_max_questions` is clamped into. |
| 17 | pub const MIN_CONFIGURABLE_QUESTIONS: usize = 1; |
| 18 | pub const MAX_CONFIGURABLE_QUESTIONS: usize = 10; |
| 19 | /// Inclusive bounds a configured `user_input_max_options` is clamped into. |
| 20 | /// The floor is 2 because a one-option question is not a choice. |
| 21 | pub const MIN_CONFIGURABLE_OPTIONS: usize = 2; |
| 22 | pub const MAX_CONFIGURABLE_OPTIONS: usize = 10; |
| 23 | |
| 24 | /// Config key naming used in both the clamp WARN and the rejection message, so |
| 25 | /// a model that hits the ceiling is told exactly where to raise it. |
| 26 | pub const MAX_QUESTIONS_KEY: &str = "[tools] user_input_max_questions"; |
| 27 | pub const MAX_OPTIONS_KEY: &str = "[tools] user_input_max_options"; |
| 28 | |
| 29 | /// Effective `request_user_input` payload ceilings for one session. |
| 30 | /// |
| 31 | /// Resolved once from `[tools]` in config.toml (see |
| 32 | /// [`crate::config::Config::user_input_limits`]) and carried to the three |
| 33 | /// places that must agree: the validator, the tool's JSON schema, and its |
| 34 | /// model-visible description. |
| 35 | #[derive(Debug, Clone, Copy, PartialEq, Eq)] |
| 36 | pub struct UserInputLimits { |
| 37 | pub max_questions: usize, |
| 38 | pub max_options: usize, |
| 39 | } |
| 40 | |
| 41 | impl Default for UserInputLimits { |
| 42 | fn default() -> Self { |
| 43 | Self { |
| 44 | max_questions: DEFAULT_MAX_QUESTIONS, |
| 45 | max_options: DEFAULT_MAX_OPTIONS, |
| 46 | } |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | impl UserInputLimits { |
| 51 | /// Resolve raw `[tools]` values, clamping each into its supported range. |
| 52 | /// An out-of-range value is honoured as far as it can be rather than |
| 53 | /// failing the load, and says so once with the key and the value used. |
| 54 | #[must_use] |
| 55 | pub fn from_config_values(max_questions: Option<u32>, max_options: Option<u32>) -> Self { |
| 56 | Self { |
| 57 | max_questions: clamp_with_warn( |
| 58 | max_questions, |
| 59 | DEFAULT_MAX_QUESTIONS, |
| 60 | MIN_CONFIGURABLE_QUESTIONS, |
| 61 | MAX_CONFIGURABLE_QUESTIONS, |
| 62 | MAX_QUESTIONS_KEY, |
| 63 | ), |
| 64 | max_options: clamp_with_warn( |
| 65 | max_options, |
| 66 | DEFAULT_MAX_OPTIONS, |
| 67 | MIN_CONFIGURABLE_OPTIONS, |
| 68 | MAX_CONFIGURABLE_OPTIONS, |
| 69 | MAX_OPTIONS_KEY, |
| 70 | ), |
| 71 | } |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | fn clamp_with_warn(raw: Option<u32>, default: usize, min: usize, max: usize, key: &str) -> usize { |
| 76 | let Some(raw) = raw else { |
| 77 | return default; |
| 78 | }; |
| 79 | let raw = raw as usize; |
| 80 | let clamped = raw.clamp(min, max); |
| 81 | if clamped != raw { |
| 82 | tracing::warn!( |
| 83 | "`{key}` = {raw} is outside the supported range {min}..={max}; using {clamped}" |
| 84 | ); |
| 85 | } |
| 86 | clamped |
| 87 | } |
| 88 | |
| 89 | #[derive(Debug, Clone, Serialize, Deserialize)] |
| 90 | pub struct UserInputOption { |
| 91 | pub label: String, |
| 92 | pub description: String, |
| 93 | } |
| 94 | |
| 95 | #[derive(Debug, Clone, Serialize, Deserialize)] |
| 96 | pub struct UserInputQuestion { |
| 97 | pub header: String, |
| 98 | pub id: String, |
| 99 | pub question: String, |
| 100 | pub options: Vec<UserInputOption>, |
| 101 | /// When `true`, the modal offers a free-text "Other" response in addition |
| 102 | /// to the fixed options. Defaults to `false` for backwards compatibility |
| 103 | /// (older payloads omitting the field get the previous behavior). |
| 104 | #[serde(default)] |
| 105 | pub allow_free_text: bool, |
| 106 | /// When `true`, the user may select more than one option before confirming. |
| 107 | #[serde(default)] |
| 108 | pub multi_select: bool, |
| 109 | } |
| 110 | |
| 111 | #[derive(Debug, Clone, Serialize, Deserialize)] |
| 112 | pub struct UserInputRequest { |
| 113 | pub questions: Vec<UserInputQuestion>, |
| 114 | } |
| 115 | |
| 116 | impl UserInputRequest { |
| 117 | /// Parse and validate against the built-in default limits. Call sites that |
| 118 | /// hold a session's resolved config use [`Self::from_value_with_limits`]. |
| 119 | #[cfg(test)] |
| 120 | pub fn from_value(value: &Value) -> Result<Self, ToolError> { |
| 121 | Self::from_value_with_limits(value, UserInputLimits::default()) |
| 122 | } |
| 123 | |
| 124 | pub fn from_value_with_limits( |
| 125 | value: &Value, |
| 126 | limits: UserInputLimits, |
| 127 | ) -> Result<Self, ToolError> { |
| 128 | let request: UserInputRequest = serde_json::from_value(value.clone()).map_err(|e| { |
| 129 | ToolError::invalid_input(format!("Invalid request_user_input payload: {e}")) |
| 130 | })?; |
| 131 | request.validate_with_limits(limits)?; |
| 132 | Ok(request) |
| 133 | } |
| 134 | |
| 135 | #[cfg(test)] |
| 136 | pub fn validate(&self) -> Result<(), ToolError> { |
| 137 | self.validate_with_limits(UserInputLimits::default()) |
| 138 | } |
| 139 | |
| 140 | pub fn validate_with_limits(&self, limits: UserInputLimits) -> Result<(), ToolError> { |
| 141 | if self.questions.is_empty() { |
| 142 | return Err(ToolError::invalid_input( |
| 143 | "request_user_input.questions must be non-empty", |
| 144 | )); |
| 145 | } |
| 146 | if self.questions.len() > limits.max_questions { |
| 147 | // Name the ceiling *and* where to raise it: a rejection the model |
| 148 | // cannot act on just burns another turn (#5949). |
| 149 | return Err(ToolError::invalid_input(format!( |
| 150 | "request_user_input.questions must contain 1 to {max} items (got {got}); \ |
| 151 | raise the ceiling with `{MAX_QUESTIONS_KEY}` in config.toml \ |
| 152 | (supported range {MIN_CONFIGURABLE_QUESTIONS}..={MAX_CONFIGURABLE_QUESTIONS})", |
| 153 | max = limits.max_questions, |
| 154 | got = self.questions.len(), |
| 155 | ))); |
| 156 | } |
| 157 | for q in &self.questions { |
| 158 | if q.header.trim().is_empty() { |
| 159 | return Err(ToolError::invalid_input( |
| 160 | "request_user_input.questions.header cannot be empty", |
| 161 | )); |
| 162 | } |
| 163 | if q.id.trim().is_empty() { |
| 164 | return Err(ToolError::invalid_input( |
| 165 | "request_user_input.questions.id cannot be empty", |
| 166 | )); |
| 167 | } |
| 168 | if q.question.trim().is_empty() { |
| 169 | return Err(ToolError::invalid_input( |
| 170 | "request_user_input.questions.question cannot be empty", |
| 171 | )); |
| 172 | } |
| 173 | if q.options.len() < MIN_CONFIGURABLE_OPTIONS || q.options.len() > limits.max_options { |
| 174 | return Err(ToolError::invalid_input(format!( |
| 175 | "request_user_input.questions.options must contain \ |
| 176 | {MIN_CONFIGURABLE_OPTIONS} to {max} items (got {got}); \ |
| 177 | raise the ceiling with `{MAX_OPTIONS_KEY}` in config.toml \ |
| 178 | (supported range {MIN_CONFIGURABLE_OPTIONS}..={MAX_CONFIGURABLE_OPTIONS})", |
| 179 | max = limits.max_options, |
| 180 | got = q.options.len(), |
| 181 | ))); |
| 182 | } |
| 183 | for opt in &q.options { |
| 184 | if opt.label.trim().is_empty() { |
| 185 | return Err(ToolError::invalid_input( |
| 186 | "request_user_input option label cannot be empty", |
| 187 | )); |
| 188 | } |
| 189 | if opt.description.trim().is_empty() { |
| 190 | return Err(ToolError::invalid_input( |
| 191 | "request_user_input option description cannot be empty", |
| 192 | )); |
| 193 | } |
| 194 | } |
| 195 | } |
| 196 | Ok(()) |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | #[derive(Debug, Clone, Serialize, Deserialize)] |
| 201 | pub struct UserInputAnswer { |
| 202 | pub id: String, |
| 203 | pub label: String, |
| 204 | pub value: String, |
| 205 | } |
| 206 | |
| 207 | #[derive(Debug, Clone, Serialize, Deserialize)] |
| 208 | pub struct UserInputResponse { |
| 209 | pub answers: Vec<UserInputAnswer>, |
| 210 | } |
| 211 | |
| 212 | pub struct RequestUserInputTool { |
| 213 | limits: UserInputLimits, |
| 214 | /// Rendered once at construction: `description` hands out a borrow, and the |
| 215 | /// effective ceiling only changes when the registry is rebuilt. |
| 216 | description: String, |
| 217 | } |
| 218 | |
| 219 | impl Default for RequestUserInputTool { |
| 220 | fn default() -> Self { |
| 221 | Self::new(UserInputLimits::default()) |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | impl RequestUserInputTool { |
| 226 | #[must_use] |
| 227 | pub fn new(limits: UserInputLimits) -> Self { |
| 228 | Self { |
| 229 | description: format!( |
| 230 | "Ask the user 1-{} short questions with selectable options and return their \ |
| 231 | selections. Reach for this when a decision is genuinely the user's to make and guessing \ |
| 232 | would be costly or wrong: ambiguous scope, an irreversible or expensive choice, a missing \ |
| 233 | preference, or a fork the user should own. Do not use it for facts you can find in the \ |
| 234 | workspace — investigate those instead. The call blocks until the user answers.", |
| 235 | limits.max_questions |
| 236 | ), |
| 237 | limits, |
| 238 | } |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | #[async_trait] |
| 243 | impl ToolSpec for RequestUserInputTool { |
| 244 | fn name(&self) -> &'static str { |
| 245 | "request_user_input" |
| 246 | } |
| 247 | |
| 248 | fn description(&self) -> &str { |
| 249 | &self.description |
| 250 | } |
| 251 | |
| 252 | fn input_schema(&self) -> Value { |
| 253 | json!({ |
| 254 | "type": "object", |
| 255 | "properties": { |
| 256 | "questions": { |
| 257 | "type": "array", |
| 258 | "items": { |
| 259 | "type": "object", |
| 260 | "properties": { |
| 261 | "header": { "type": "string" }, |
| 262 | "id": { "type": "string" }, |
| 263 | "question": { "type": "string" }, |
| 264 | "options": { |
| 265 | "type": "array", |
| 266 | "items": { |
| 267 | "type": "object", |
| 268 | "properties": { |
| 269 | "label": { "type": "string" }, |
| 270 | "description": { "type": "string" } |
| 271 | }, |
| 272 | "required": ["label", "description"] |
| 273 | }, |
| 274 | "minItems": MIN_CONFIGURABLE_OPTIONS, |
| 275 | "maxItems": self.limits.max_options |
| 276 | }, |
| 277 | "allow_free_text": { |
| 278 | "type": "boolean", |
| 279 | "description": "When true, also offer a free-text 'Other' response. Defaults to false.", |
| 280 | "default": false |
| 281 | }, |
| 282 | "multi_select": { |
| 283 | "type": "boolean", |
| 284 | "description": "When true, allow selecting more than one option. Defaults to false.", |
| 285 | "default": false |
| 286 | } |
| 287 | }, |
| 288 | "required": ["header", "id", "question", "options"] |
| 289 | }, |
| 290 | "minItems": 1, |
| 291 | "maxItems": self.limits.max_questions |
| 292 | } |
| 293 | }, |
| 294 | "required": ["questions"] |
| 295 | }) |
| 296 | } |
| 297 | |
| 298 | fn capabilities(&self) -> Vec<ToolCapability> { |
| 299 | vec![ToolCapability::ReadOnly] |
| 300 | } |
| 301 | |
| 302 | fn approval_requirement(&self) -> ApprovalRequirement { |
| 303 | ApprovalRequirement::Auto |
| 304 | } |
| 305 | |
| 306 | async fn execute( |
| 307 | &self, |
| 308 | _input: Value, |
| 309 | _context: &ToolContext, |
| 310 | ) -> Result<ToolResult, ToolError> { |
| 311 | Err(ToolError::execution_failed( |
| 312 | "request_user_input must be handled by the engine", |
| 313 | )) |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | #[cfg(test)] |
| 318 | mod tests { |
| 319 | use super::*; |
| 320 | |
| 321 | #[test] |
| 322 | fn validates_request_shape() { |
| 323 | let request = UserInputRequest { |
| 324 | questions: vec![UserInputQuestion { |
| 325 | header: "Pick".to_string(), |
| 326 | id: "choice".to_string(), |
| 327 | question: "Which option?".to_string(), |
| 328 | options: vec![ |
| 329 | UserInputOption { |
| 330 | label: "A".to_string(), |
| 331 | description: "Option A".to_string(), |
| 332 | }, |
| 333 | UserInputOption { |
| 334 | label: "B".to_string(), |
| 335 | description: "Option B".to_string(), |
| 336 | }, |
| 337 | ], |
| 338 | allow_free_text: false, |
| 339 | multi_select: false, |
| 340 | }], |
| 341 | }; |
| 342 | assert!(request.validate().is_ok()); |
| 343 | } |
| 344 | |
| 345 | #[test] |
| 346 | fn from_value_accepts_four_options_and_flags() { |
| 347 | // Mirrors the json!-literal style used in tools/subagent/tests.rs and |
| 348 | // exercises the schema-loosening from issue #3102: 4 options (was capped |
| 349 | // at 3) plus the new allow_free_text / multi_select flags. |
| 350 | let input = json!({ |
| 351 | "questions": [{ |
| 352 | "header": "Scope", |
| 353 | "id": "scope", |
| 354 | "question": "Which surfaces should this change affect?", |
| 355 | "options": [ |
| 356 | { "label": "TUI", "description": "Visible modal flow only" }, |
| 357 | { "label": "Headless", "description": "Protocol event only" }, |
| 358 | { "label": "All surfaces", "description": "TUI and headless" }, |
| 359 | { "label": "CLI", "description": "Command-line surface" } |
| 360 | ], |
| 361 | "allow_free_text": true, |
| 362 | "multi_select": true |
| 363 | }] |
| 364 | }); |
| 365 | let request = UserInputRequest::from_value(&input).expect("4 options + flags parse"); |
| 366 | assert_eq!(request.questions.len(), 1); |
| 367 | assert_eq!(request.questions[0].options.len(), 4); |
| 368 | assert!(request.questions[0].allow_free_text); |
| 369 | assert!(request.questions[0].multi_select); |
| 370 | } |
| 371 | |
| 372 | #[test] |
| 373 | fn from_value_defaults_flags_when_omitted() { |
| 374 | // Backwards compatibility: a legacy payload omitting the new boolean |
| 375 | // fields must still parse, defaulting both to false. |
| 376 | let input = json!({ |
| 377 | "questions": [{ |
| 378 | "header": "Pick", |
| 379 | "id": "choice", |
| 380 | "question": "Which?", |
| 381 | "options": [ |
| 382 | { "label": "A", "description": "a" }, |
| 383 | { "label": "B", "description": "b" } |
| 384 | ] |
| 385 | }] |
| 386 | }); |
| 387 | let request = UserInputRequest::from_value(&input).expect("legacy payload parses"); |
| 388 | assert!(!request.questions[0].allow_free_text); |
| 389 | assert!(!request.questions[0].multi_select); |
| 390 | } |
| 391 | |
| 392 | #[test] |
| 393 | fn rejects_five_options() { |
| 394 | let input = json!({ |
| 395 | "questions": [{ |
| 396 | "header": "Pick", |
| 397 | "id": "choice", |
| 398 | "question": "Which?", |
| 399 | "options": [ |
| 400 | { "label": "A", "description": "a" }, |
| 401 | { "label": "B", "description": "b" }, |
| 402 | { "label": "C", "description": "c" }, |
| 403 | { "label": "D", "description": "d" }, |
| 404 | { "label": "E", "description": "e" } |
| 405 | ] |
| 406 | }] |
| 407 | }); |
| 408 | let err = UserInputRequest::from_value(&input).expect_err("5 options must fail"); |
| 409 | assert!(err.to_string().contains("2 to 4 items")); |
| 410 | } |
| 411 | |
| 412 | fn yes_no_question(header: &str, id: &str) -> UserInputQuestion { |
| 413 | UserInputQuestion { |
| 414 | header: header.to_string(), |
| 415 | id: id.to_string(), |
| 416 | question: "?".to_string(), |
| 417 | options: vec![ |
| 418 | UserInputOption { |
| 419 | label: "A".to_string(), |
| 420 | description: "A".to_string(), |
| 421 | }, |
| 422 | UserInputOption { |
| 423 | label: "B".to_string(), |
| 424 | description: "B".to_string(), |
| 425 | }, |
| 426 | ], |
| 427 | allow_free_text: false, |
| 428 | multi_select: false, |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | fn questions(count: usize) -> UserInputRequest { |
| 433 | UserInputRequest { |
| 434 | questions: (1..=count) |
| 435 | .map(|i| yes_no_question(&format!("Q{i}"), &format!("q{i}"))) |
| 436 | .collect(), |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | #[test] |
| 441 | fn default_limits_are_six_questions_and_four_options() { |
| 442 | let limits = UserInputLimits::default(); |
| 443 | assert_eq!(limits.max_questions, 6); |
| 444 | assert_eq!(limits.max_options, 4); |
| 445 | // An empty `[tools]` table resolves to the same ceilings. |
| 446 | assert_eq!(UserInputLimits::from_config_values(None, None), limits); |
| 447 | let tool = RequestUserInputTool::default(); |
| 448 | let description = tool.description(); |
| 449 | assert!(description.contains("Ask the user 1-6 short questions")); |
| 450 | assert!(description.contains("blocks until the user answers")); |
| 451 | } |
| 452 | |
| 453 | #[test] |
| 454 | fn accepts_six_questions_by_default() { |
| 455 | assert!(questions(6).validate().is_ok()); |
| 456 | } |
| 457 | |
| 458 | #[test] |
| 459 | fn rejects_seven_questions_and_names_the_config_key() { |
| 460 | let err = questions(7) |
| 461 | .validate() |
| 462 | .expect_err("7 questions exceeds the default ceiling of 6"); |
| 463 | let msg = err.to_string(); |
| 464 | assert!(msg.contains("1 to 6 items"), "{msg}"); |
| 465 | assert!(msg.contains("got 7"), "{msg}"); |
| 466 | assert!(msg.contains("[tools] user_input_max_questions"), "{msg}"); |
| 467 | assert!(msg.contains("config.toml"), "{msg}"); |
| 468 | } |
| 469 | |
| 470 | #[test] |
| 471 | fn rejected_option_count_names_the_config_key() { |
| 472 | let input = json!({ |
| 473 | "questions": [{ |
| 474 | "header": "Pick", |
| 475 | "id": "choice", |
| 476 | "question": "Which?", |
| 477 | "options": [ |
| 478 | { "label": "A", "description": "a" }, |
| 479 | { "label": "B", "description": "b" }, |
| 480 | { "label": "C", "description": "c" }, |
| 481 | { "label": "D", "description": "d" }, |
| 482 | { "label": "E", "description": "e" } |
| 483 | ] |
| 484 | }] |
| 485 | }); |
| 486 | let msg = UserInputRequest::from_value(&input) |
| 487 | .expect_err("5 options must fail") |
| 488 | .to_string(); |
| 489 | assert!(msg.contains("[tools] user_input_max_options"), "{msg}"); |
| 490 | } |
| 491 | |
| 492 | #[test] |
| 493 | fn configured_limits_widen_and_narrow_the_validator() { |
| 494 | let wide = UserInputLimits::from_config_values(Some(9), Some(6)); |
| 495 | assert!(questions(9).validate_with_limits(wide).is_ok()); |
| 496 | |
| 497 | let narrow = UserInputLimits::from_config_values(Some(2), None); |
| 498 | let msg = questions(3) |
| 499 | .validate_with_limits(narrow) |
| 500 | .expect_err("3 questions exceeds a configured ceiling of 2") |
| 501 | .to_string(); |
| 502 | assert!(msg.contains("1 to 2 items"), "{msg}"); |
| 503 | } |
| 504 | |
| 505 | #[test] |
| 506 | fn out_of_range_config_values_clamp() { |
| 507 | // Below the floor and far above the ceiling both clamp instead of |
| 508 | // failing the config load. |
| 509 | let low = UserInputLimits::from_config_values(Some(0), Some(0)); |
| 510 | assert_eq!(low.max_questions, MIN_CONFIGURABLE_QUESTIONS); |
| 511 | assert_eq!(low.max_options, MIN_CONFIGURABLE_OPTIONS); |
| 512 | |
| 513 | let high = UserInputLimits::from_config_values(Some(50), Some(50)); |
| 514 | assert_eq!(high.max_questions, MAX_CONFIGURABLE_QUESTIONS); |
| 515 | assert_eq!(high.max_options, MAX_CONFIGURABLE_OPTIONS); |
| 516 | } |
| 517 | |
| 518 | #[test] |
| 519 | fn schema_and_description_reflect_configured_limits() { |
| 520 | let tool = RequestUserInputTool::new(UserInputLimits::from_config_values(Some(8), Some(5))); |
| 521 | let description = tool.description(); |
| 522 | assert!(description.contains("Ask the user 1-8 short questions")); |
| 523 | assert!(description.contains("blocks until the user answers")); |
| 524 | let schema = tool.input_schema(); |
| 525 | let questions = &schema["properties"]["questions"]; |
| 526 | assert_eq!(questions["minItems"], json!(1)); |
| 527 | assert_eq!(questions["maxItems"], json!(8)); |
| 528 | let options = &questions["items"]["properties"]["options"]; |
| 529 | assert_eq!(options["minItems"], json!(2)); |
| 530 | assert_eq!(options["maxItems"], json!(5)); |
| 531 | |
| 532 | // Defaults land on the documented 6 / 4 pair. |
| 533 | let default_schema = RequestUserInputTool::default().input_schema(); |
| 534 | assert_eq!( |
| 535 | default_schema["properties"]["questions"]["maxItems"], |
| 536 | json!(6) |
| 537 | ); |
| 538 | assert_eq!( |
| 539 | default_schema["properties"]["questions"]["items"]["properties"]["options"]["maxItems"], |
| 540 | json!(4) |
| 541 | ); |
| 542 | } |
| 543 | |
| 544 | #[test] |
| 545 | fn rejects_too_many_questions() { |
| 546 | // Seven is one past the default ceiling; four now parses (#5949). |
| 547 | assert!(questions(4).validate().is_ok()); |
| 548 | assert!(questions(7).validate().is_err()); |
| 549 | } |
| 550 | } |
| 551 |