def frame(params = nil)
      if params
        frame = params
        self
      else
        if selected.length == 1
          Rect.frame_for_view(selected.first)
        else
          selected.map{|s| Rect.frame_for_view(s)}
        end
      end
    end
def frame(params = nil)
      if params
        frame = params
        self
      else
        if selected.length == 1
          Rect.frame_for_view(selected.first)
        else
          selected.map{|s| Rect.frame_for_view(s)}
        end
      end
    end
@return RubyMotionQuery::Rect or array of RubyMotionQuery::Rect

 @example
 left = rmq(my_view).frame.left