class RSpec::Core::Configuration

def include(mod, *filters)

Other tags:
    See: #prepend -
    See: #extend -

Other tags:
    Note: - Filtered module inclusions can also be applied to 
def include(mod, *filters)
  meta = Metadata.build_hash_from(filters, :warn_about_example_group_filtering)
  @include_modules.append(mod, meta)
  configure_existing_groups(mod, meta, :safe_include)
end