code: def get_default_configs(self) -> List[NebiusConfigInfoWithCreds]:
      return []
  
imports: import json
  from typing import List
  import requests
  import dstack._internal.core.backends.nebius.api_client
  from dstack._internal.core.backends.base import Backend
  from dstack._internal.core.backends.nebius import NebiusBackend
  from dstack._internal.core.backends.nebius.config import NebiusConfig
  from dstack._internal.core.models.backends.base import BackendType, ConfigElementValue, ConfigMultiElement
  from dstack._internal.core.models.backends.nebius import NebiusConfigInfo, NebiusConfigInfoWithCreds, NebiusConfigInfoWithCredsPartial, NebiusConfigValues, NebiusCreds, NebiusStoredConfig
  from dstack._internal.server.models import BackendModel, ProjectModel
  from dstack._internal.server.services.backends import Configurator
  from dstack._internal.server.services.backends.configurators.base import raise_invalid_credentials_error
label_desc: Use image node_id 1 for calling the NebiusConfigurator obj's underlying member method code with example usage: obj.get_default_configs() and returns: list