code: def _create_clients(self, timeout, proxy):
          # type: (StorageAccount, blobxfer.models.options.Timeout,
          #        blobxfer.models.options.HttpProxy) -> None
          
          self._append_blob_client = \
              blobxfer.operations.azure.blob.append.create_client(
                  self, timeout, proxy)
          self._block_blob_client = \
              blobxfer.operations.azure.blob.block.create_client(
                  self, timeout, proxy)
          self._file_client = blobxfer.operations.azure.file.create_client(
              self, timeout, proxy)
          self._page_blob_client = \
              blobxfer.operations.azure.blob.page.create_client(
                  self, timeout, proxy)
docs: Create Azure Storage clients
          :param StorageAccount self: this
          :param blobxfer.models.options.Timeout timeout: timeout
          :param blobxfer.models.options.HttpProxy proxy: proxy