src/huggingface_hub/inference/_providers/_common.py [212:228]:
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    def _prepare_payload_as_dict(
        self, inputs: Any, parameters: Dict, provider_mapping_info: InferenceProviderMapping
    ) -> Optional[Dict]:
        """Return the payload to use for the request, as a dict.

        Override this method in subclasses for customized payloads.
        Only one of `_prepare_payload_as_dict` and `_prepare_payload_as_bytes` should return a value.
        """
        return None

    def _prepare_payload_as_bytes(
        self,
        inputs: Any,
        parameters: Dict,
        provider_mapping_info: InferenceProviderMapping,
        extra_payload: Optional[Dict],
    ) -> Optional[bytes]:
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src/huggingface_hub/inference/_providers/hf_inference.py [66:77]:
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    def _prepare_payload_as_dict(
        self, inputs: Any, parameters: Dict, provider_mapping_info: InferenceProviderMapping
    ) -> Optional[Dict]:
        return None

    def _prepare_payload_as_bytes(
        self,
        inputs: Any,
        parameters: Dict,
        provider_mapping_info: InferenceProviderMapping,
        extra_payload: Optional[Dict],
    ) -> Optional[bytes]:
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