module RSpec::Mocks::TestDouble

def extract_options(stubs_and_options)
  if stubs_and_options[:null_object]
    @null_object = stubs_and_options.delete(:null_object)
    RSpec.deprecate("double('name', :null_object => true)", :replacement => "double('name').as_null_object")
  end
  options = {}
  extract_option(stubs_and_options, options, :__declared_as, 'Mock')
  options
end