docs: function(x, y, w, h) {
          var old = this._mbr || this.pos();
          this.__trim = [];
          this.__trim[0] = x;
          this.__trim[1] = y;
          this.__trim[2] = w;
          this.__trim[3] = h;
  
          this.__coord[0] += x;
          this.__coord[1] += y;
          this.__coord[2] = w;
          this.__coord[3] = h;
          this._w = w;
          this._h = h;
  
          this.trigger("Invalidate", old);
          return this;
      }