code: def delete(
      self, project_name: str, backends_names: List[BackendType]
  ):
      body = DeleteBackendsRequest(backends_names=backends_names)
      self._request(
          f"/api/project/{project_name}/backends/delete",
          body=body.json(),
      )
  
file_path: dstack/src/dstack/api/server/_backends.py
imports: from typing import List
  from pydantic import parse_obj_as
  from dstack._internal.core.models.backends import AnyConfigInfoWithCreds, AnyConfigInfoWithCredsPartial, AnyConfigValues
  from dstack._internal.core.models.backends.base import BackendType
  from dstack._internal.server.schemas.backends import DeleteBackendsRequest
  from dstack.api.server._group import APIClientGroup
label_desc: Use image node_id 5 for calling the BackendsAPIClient obj's underlying member method code with example usage: obj.delete(project_name, backends_names) without return types