@staticmethod
  def Instance():
    if not hasattr(ResourcesManager, '_instance'):
      ResourcesManager._instance = ResourcesManager()
    return ResourcesManager._instance
Decorator to be used in migrations. This decorator monkeypatch a given
dataset/ETHPy150Open viewfinderco/viewfinder/backend/resources/resources_mgr.py/ResourcesManager.Instance--crossover with--dataset/ETHPy150Open scieloorg/scielo-manager/scielomanager/scielomanager/utils/migrations.py/safe_autodatetime