class ActiveSupport::Callbacks::CallTemplate::InstanceExec0

def expand(target, value, block)
  [target, @override_block, :instance_exec]
end

def initialize(block)
  @override_block = block
end

def inverted_lambda
  lambda do |target, value, &block|
    !target.instance_exec(&@override_block)
  end
end

def make_lambda
  lambda do |target, value, &block|
    target.instance_exec(&@override_block)
  end
end