receiver -> object
[permalink][rdoc]このメソッドオブジェクトのレシーバを返します。
例:
class Foo def foo(arg) "foo called with arg #{arg}" end end m = Foo.new.method(:foo) # => #<Method: Foo#foo> m.receiver # => #<Foo:0x007fb39203eb78> m.receiver.foo(1) # => "foo called with arg 1"