# File lib/rspec/matchers/built_in/change.rb, line 5
        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