text: from typing import Dict, Optional
  
  from line4py.service.TalkService import TalkService
  from line4py.service.TalkService.ttypes import Message, MessageRelationType, ServiceCode
  
  
  class TalkServiceClient(TalkService.Client):
  
      def __init__(self, iprot):
          super().__init__(iprot)
  
      def send_text(self,
                    seq: int,
                    to: str,
                    text: str,
                    content_metadata: Optional[Dict[str, str]] = None,
                    related_message_id: Optional[str] = None):
          msg = Message(
              to=to,
              text=text,
              contentMetadata=content_metadata,
          )
          if related_message_id:
              msg.relatedMessageId = related_message_id
              msg.messageRelationType = MessageRelationType.REPLY
              msg.relatedMessageServiceCode = ServiceCode.TALK
  
          return self.sendMessage(seq, msg)
  