class Protobuf::Message

def self.all_fields
  @all_fields ||= begin
                    all_fields_array = []
                    max_fields = fields.size > extension_fields.size ? fields.size : extension_fields.size
                    max_fields.times do |field_number|
                      all_fields_array << (fields[field_number] || extension_fields[field_number])
                    end
                    all_fields_array.compact!
                    all_fields_array
                  end
end