code: def size_file(self, path):
      from azure.core.exceptions import ResourceNotFoundError
  
      try:
          return (
              self.root_client.get_blob_client(path)
              .get_blob_properties()
              .size
          )
      except ResourceNotFoundError:
          return None
      except Exception as e:
          process_exception(e)
  
imports: import json
  import os
  import shutil
  import uuid
  import time
  from concurrent.futures import as_completed
  from tempfile import mkdtemp
  from metaflow.datastore.datastore_storage import DataStoreStorage, CloseAfterUse
  from metaflow.exception import MetaflowInternalError
  from metaflow.metaflow_config import DATASTORE_SYSROOT_AZURE, ARTIFACT_LOCALROOT, AZURE_STORAGE_WORKLOAD_TYPE
  from metaflow.plugins.azure.azure_utils import check_azure_deps, process_exception, handle_exceptions, create_static_token_credential, parse_azure_full_path
  from metaflow.plugins.azure.blob_service_client_factory import get_azure_blob_service_client
  from metaflow.plugins.storage_executor import StorageExecutor, handle_executor_exceptions
label_desc: Use image node_id 7 for calling the AzureStorage obj's underlying member method code with example usage: obj.size_file(path) and returns: self, None