class RSpec::Core::Formatters::Loader

def setup_default(output_stream, deprecation_stream)
  add default_formatter, output_stream if @formatters.empty?
  unless @formatters.any? { |formatter| DeprecationFormatter === formatter }
    add DeprecationFormatter, deprecation_stream, output_stream
  end
  unless existing_formatter_implements?(:message)
    add FallbackMessageFormatter, output_stream
  end
  return unless RSpec.configuration.profile_examples?
  return if existing_formatter_implements?(:dump_profile)
  add RSpec::Core::Formatters::ProfileFormatter, output_stream
end