In Zendesk, when the incident is created through the Chat Channel, the whole chat get added as the comments. 

From the API response, we want to identify which are the chats and which are the original Comments. 

We want to use Channel object, which exact channel object I can use for Chat ??

Is it Chat Channel  or Offline_Chat Channel, what if the Chat is Channel is customized ????

F.e At our customer end, in the comment API response, for Chat, the channel was mentioned as below:

"channel": "chat_transcript",

So, how can we use the unique Channel object to indetify the Chat comments from Comment API response?