# File activesupport/lib/active_support/callbacks.rb, line 479
def initialize(block)
  @override_block = block
end

# File activesupport/lib/active_support/callbacks.rb, line 483
def expand(target, value, block)
  raise ArgumentError unless block
  [target, @override_block || block, :instance_exec, target, block]
end

# File activesupport/lib/active_support/callbacks.rb, line 495
def inverted_lambda
  lambda do |target, value, &block|
    raise ArgumentError unless block
    !target.instance_exec(target, block, &@override_block)
  end
end

# File activesupport/lib/active_support/callbacks.rb, line 488
def make_lambda
  lambda do |target, value, &block|
    raise ArgumentError unless block
    target.instance_exec(target, block, &@override_block)
  end
end