code: def get_workflow_metadata(namespace, workspace, submission_id, workflow_id):
      
      uri = "workspaces/{0}/{1}/submissions/{2}/workflows/{3}".format(namespace,
                                              workspace, submission_id, workflow_id)
      return __get(uri)
docs: Request the metadata for a workflow in a submission.
  
      Args:
          namespace (str): project to which workspace belongs
          workspace (str): Workspace name
          submission_id (str): Submission's unique identifier
          workflow_id (str): Workflow's unique identifier.
  
      Swagger:
          https://api.firecloud.org/#!/Submissions/workflowMetadata