def by_qna_id(self,qna_id: str) -> QnaItemRequestBuilder:
        """
        Provides operations to manage the qnas property of the microsoft.graph.searchEntity entity.
        param qna_id: The unique identifier of qna
        Returns: QnaItemRequestBuilder
        """
        if qna_id is None:
            raise TypeError("qna_id cannot be null.")
        from .item.qna_item_request_builder import QnaItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["qna%2Did"] = qna_id
        return QnaItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the qnas property of the microsoft.graph.searchEntity entity.
        param qna_id: The unique identifier of qna
        Returns: QnaItemRequestBuilder
        
msgraph/generated/search/qnas/qnas_request_builder.py