class RSpec::Core::Metadata

def process(*args)
  user_metadata = args.last.is_a?(Hash) ? args.pop : {}
  ensure_valid_keys(user_metadata)
  self[:example_group].store(:description_args, args)
  self[:example_group].store(:caller, user_metadata.delete(:caller) || caller)
  self[:example_group][:description_arg_behavior_changing_in_rspec_3] = user_metadata.delete(:description_arg_behavior_changing_in_rspec_3)
  update(user_metadata)
end