MessageStartEvent ¶ Source code in docs_src/capo_bedrock_runtime/types/message_start_event.py 15 16 17class MessageStartEvent(TypedDict, closed=True): role: "capo_bedrock_runtime.types.conversation_role.ConversationRole" """<p>The role for the message.</p>""" role instance-attribute ¶ role: ConversationRole The role for the message.