in src/agents/models/multi_provider.py [0:0]
def _get_prefix_and_model_name(self, model_name: str | None) -> tuple[str | None, str | None]:
if model_name is None:
return None, None
elif "/" in model_name:
prefix, model_name = model_name.split("/", 1)
return prefix, model_name
else:
return None, model_name