code: def anonymous_operation_not_alone_message():
      return (
          "This anonymous operation must be the only defined operation."
      )
  
file_path: wandb/wandb/vendor/graphql-core-1.1/wandb_graphql/validation/rules/lone_anonymous_operation.py
imports: from ...error import GraphQLError
  from ...language import ast
  from .base import ValidationRule
label_desc: Use image node_id 4 for calling the LoneAnonymousOperation obj's underlying member method code with example usage: obj.anonymous_operation_not_alone_message() and returns: str