class RSpec::Core::Configuration

def alias_example_to(new_name, *args)

crazy_slow as an example variant that has the crazy_slow speed option
E.g. alias_example_to :crazy_slow, :speed => 'crazy_slow' defines 
def alias_example_to(new_name, *args)
  extra_options = build_metadata_hash_from(args)
  RSpec::Core::ExampleGroup.alias_example_to(new_name, extra_options)
end