class RSpec::Core::ExampleGroup

def self.set_it_up(*args)
  # Ruby 1.9 has a bug that can lead to infinite recursion and a
  # SystemStackError if you include a module in a superclass after
  # including it in a subclass: https://gist.github.com/845896
  # To prevent this, we must include any modules in RSpec::Core::ExampleGroup
  # before users create example groups and have a chance to include
  # the same module in a subclass of RSpec::Core::ExampleGroup.
  # So we need to configure example groups here.
  ensure_example_groups_are_configured
  symbol_description = args.shift if args.first.is_a?(Symbol)
  args << build_metadata_hash_from(args)
  args.unshift(symbol_description) if symbol_description
  @metadata = RSpec::Core::Metadata.new(superclass_metadata).process(*args)
  world.configure_group(self)
end