def _get_fallback_provider()

in src/agents/models/multi_provider.py [0:0]


    def _get_fallback_provider(self, prefix: str | None) -> ModelProvider:
        if prefix is None or prefix == "openai":
            return self.openai_provider
        elif prefix in self._fallback_providers:
            return self._fallback_providers[prefix]
        else:
            self._fallback_providers[prefix] = self._create_fallback_provider(prefix)
            return self._fallback_providers[prefix]