code: function copy(rect) {
           return this.setShape(rect.pos.x, rect.pos.y, rect._width, rect._height);
         }
docs: copy the position and size of the given rectangle into this one
  @name copy
  @memberOf me.Rect.prototype
  @function
  @param {me.Rect} rect Source rectangle
  @return {me.Rect} new rectangle