class Grape::ErrorFormatter::Txt

def self.format_structured_message(structured_message)
  message = structured_message[:message] || Grape::Json.dump(structured_message)
  Array.wrap(message).tap do |final_message|
    if structured_message.key?(:backtrace)
      final_message << 'backtrace:'
      final_message.concat(structured_message[:backtrace])
    end
    if structured_message.key?(:original_exception)
      final_message << 'original exception:'
      final_message << structured_message[:original_exception]
    end
  end.join("\r\n ")
end