class Faraday::Logging::Formatter

def exception(exc)
  return unless log_errors?
  error_log = proc { exc.full_message }
  public_send(log_level, 'error', &error_log)
  log_headers('error', exc.response_headers) if exc.respond_to?(:response_headers) && log_headers?(:error)
  return unless exc.respond_to?(:response_body) && exc.response_body && log_body?(:error)
  log_body('error', exc.response_body)
end