UnboundMethod

        # UnboundMethod < Object

---
# Includes:
(from gem method_source-1.0.0)
    MethodSource::SourceLocation::UnboundMethodExtensions
    MethodSource::MethodExtensions

(from ruby core)
---
Ruby supports two forms of objectified methods. Class Method is used to
represent methods that are associated with a particular object: these
method objects are bound to that object. Bound method objects for an
object can be created using Object#method.

Ruby also supports unbound methods; methods objects that are not
associated with a particular object. These can be created either by
calling Module#instance_method or by calling #unbind on a bound method
object. The result of both of these is an UnboundMethod object.

Unbound methods can only be called after they are bound to an object.
That object must be a kind_of? the method's original class.

    class Square
      def area
        @side * @side
      end
      def initialize(side)
        @side = side
      end
    end

    area_un = Square.instance_method(:area)

    s = Square.new(12)
    area = area_un.bind(s)
    area.call   #=> 144

Unbound methods are a reference to the method at the time it was
objectified: subsequent changes to the underlying class will not affect
the unbound method.

    class Test
      def test
        :original
      end
    end
    um = Test.instance_method(:test)
    class Test
      def test
        :modified
      end
    end
    t = Test.new
    t.test            #=> :modified
    um.bind(t).call   #=> :original
---
# Instance methods:

    ==
    arity
    bind
    bind_call
    clone
    eql?
    hash
    inspect
    name
    original_name
    owner
    parameters
    private?
    protected?
    public?
    source_location
    super_method
    to_s

(from gem debug-1.7.1)
---
# Instance methods:

    bind_call

---
Also found in:
    gem method_source-1.0.0