Chat Load Response
Result delivered to ChatLoadedListener when chat loading completes.
Either fragment is non-null and the chat is ready to be presented, or error is non-null and describes why the chat could not be loaded. Inspect error first; if it is null, present fragment.
Parameters
fragment
The chat UI Fragment to attach to the host, or null on failure.
error
The failure that prevented the chat from loading, or null on success.