code: function ScopeMirror(frame, fun, index, opt_details) {
    %_Call(Mirror, this, MirrorType.SCOPE_TYPE);
    if (frame) {
      this.frame_index_ = frame.index_;
    } else {
      this.frame_index_ = UNDEFINED;
    }
    this.scope_index_ = index;
    this.details_ = new ScopeDetails(frame, fun, index, opt_details);
  }
docs: Mirror object for scope of frame or function. Either frame or function must
  be specified.
  @param {FrameMirror} frame The frame this scope is a part of
  @param {FunctionMirror} function The function this scope is a part of
  @param {number} index The scope index in the frame
  @param {Array=} opt_details Raw scope details data
  @constructor
  @extends Mirror