in swarm/util.py [0:0]
def merge_chunk(final_response: dict, delta: dict) -> None:
delta.pop("role", None)
merge_fields(final_response, delta)
tool_calls = delta.get("tool_calls")
if tool_calls and len(tool_calls) > 0:
index = tool_calls[0].pop("index")
merge_fields(final_response["tool_calls"][index], tool_calls[0])