text: //// [declarationEmitDestructuringWithOptionalBindingParameters.ts]
  function foo([x,y,z]?: [string, number, boolean]) {
  }
  function foo1( { x, y, z }?: { x: string; y: number; z: boolean }) {
  }
  
  //// [declarationEmitDestructuringWithOptionalBindingParameters.js]
  function foo(_a) {
      var x = _a[0], y = _a[1], z = _a[2];
  }
  function foo1(_a) {
      var x = _a.x, y = _a.y, z = _a.z;
  }
  
  
  //// [declarationEmitDestructuringWithOptionalBindingParameters.d.ts]
  declare function foo([x, y, z]?: [string, number, boolean]): void;
  declare function foo1({x, y, z}?: {
      x: string;
      y: number;
      z: boolean;
  }): void;
  