class_docstr: A wrapper class that allows for easy interaction with a Study.
docstr: List all studies under the current project and region.
  
  Returns:
      The list of studies.
docstr_tok: ["List","all","studies","under","the","current","project","and","region",".","Returns",":","The","list","of","studies","."]
code: def list_studies(self) -> List[Dict[Text, Any]]:
      """List all studies under the current project and region.
  
      Returns:
          The list of studies.
      """
      parent_name = self._make_parent_name()
      try:
          resp = (
              self.service_client.projects()
              .locations()
              .studies()
              .list(parent=parent_name)
              .execute()
          )
      except errors.HttpError:
          tf.get_logger().info("ListStudies failed.")
          raise
      return resp.get("studies", [])
  
imports: import datetime
  import http
  import json
  import time
  from typing import Any, Dict, List, Mapping, Optional, Text, Union
  from googleapiclient import discovery
  from googleapiclient import errors
  import tensorflow
  from tensorflow_cloud.tuner import vizier_client_interface
  from tensorflow_cloud.tuner import constants
  from tensorflow_cloud.utils import google_api_client
label_desc: Use image node_id 8 for calling the _VizierClient obj's underlying member method code with example usage: obj.list_studies() and returns: resp