class RSpec::Matchers::BuiltIn::Change

def initialize(receiver=nil, message=nil, &block)

def initialize(receiver=nil, message=nil, &block)
  @message = message
  @value_proc = block || lambda {receiver.__send__(message)}
  @expected_after = @expected_before = @minimum = @maximum = @expected_delta = nil
  @eval_before = @eval_after = false
end