message: Add description into trigger classes
diff: @@ -251,6 +251,9 @@ export class SurveyTriggerComplete extends SurveyTrigger {
  if (this.owner) this.owner.setCompleted();
  }
  }
  +/**
  + * If expression returns true, the value from property **setValue** will be set to **setToName**
  + */
  export class SurveyTriggerSetValue extends SurveyTrigger {
  public setToName: string;
  public setValue: any;
  @@ -266,7 +269,9 @@ export class SurveyTriggerSetValue extends SurveyTrigger {
  this.owner.setTriggerValue(this.setToName, this.setValue, this.isVariable);
  }
  }
  -
  +/**
  + * If expression returns true, the **runExpression** will be run. If **setToName** property is not empty then the result of **runExpression** will be set to it.
  + */
  export class SurveyTriggerRunExpression extends SurveyTrigger {
  public setToName: string;
  public runExpression: any;
  @@ -289,6 +294,9 @@ export class SurveyTriggerRunExpression extends SurveyTrigger {
  }
  }
  +/**
  + * If expression returns true, the value from question **fromName** will be set into **setToName**.
  + */
  export class SurveyTriggerCopyValue extends SurveyTrigger {
  public setToName: string;
  public fromName: any;
  