class RSpec::Core::SharedExampleGroupModule

def include_in(klass, inclusion_line, args, customization_block)
  klass.update_inherited_metadata(@metadata) unless @metadata.empty?
  SharedExampleGroupInclusionStackFrame.with_frame(@description, inclusion_line) do
    RSpec::Support::WithKeywordsWhenNeeded.class_exec(klass, *args, &@definition)
    klass.class_exec(&customization_block) if customization_block
  end
end