where is the component'rest'?

[stoveZhu]

i'm learning how to use the kag with the example 'medicine'. i tried to run the evaForMedicine.py but got error below

Traceback (most recent call last):
  File "d:\work_projects\kag\KAG-master\kag\examples\medicine\solver\evaForMedicine.py", line 5, in <module>
    from kag.solver.logic.solver_pipeline import SolverPipeline
  File "d:\work_projects\kag\kag-master\kag\solver\logic\solver_pipeline.py", line 4, in <module>
    from kag.interface.solver.kag_reasoner_abc import KagReasonerABC
  File "d:\work_projects\kag\kag-master\kag\interface\solver\kag_reasoner_abc.py", line 6, in <module>
    from kag.solver.logic.core_modules.lf_solver import LFSolver
  File "d:\work_projects\kag\kag-master\kag\solver\logic\core_modules\lf_solver.py", line 15, in <module>
    from kag.solver.logic.core_modules.lf_executor import LogicExecutor
  File "d:\work_projects\kag\kag-master\kag\solver\logic\core_modules\lf_executor.py", line 6, in <module>
    from kag.common.graphstore.graph_store import GraphStore
  File "d:\work_projects\kag\kag-master\kag\common\graphstore\__init__.py", line 30, in <module>
    from kag.common.graphstore.rest.graph_api import GraphApi
  File "d:\work_projects\kag\kag-master\kag\common\graphstore\rest\__init__.py", line 30, in <module>
    from kag.common.graphstore.rest.graph_api import GraphApi
  File "d:\work_projects\kag\kag-master\kag\common\graphstore\rest\graph_api.py", line 20, in <module>
    from kag.common.rest.api_client import ApiClient
ModuleNotFoundError: No module named 'kag.common.rest'

is that kag.common.resthas been deleted some versions ago?