    # File lib/rvg/transformable.rb, line 119
                def skewY(angle)
                    begin
                        @transforms << [:skewy, [Float(angle)]]
                    rescue ArgumentError
                        raise ArgumentError, "argument must be convertable to float (got #{angle.class})"
                    end
                    yield(self) if block_given?
                    self
                end