text: from django.dispatch import Signal
  
  class_prepared = Signal(providing_args=["class"])
  
  pre_init = Signal(providing_args=["instance", "args", "kwargs"], use_caching=True)
  post_init = Signal(providing_args=["instance"], use_caching=True)
  
  pre_save = Signal(providing_args=["instance", "raw", "using", "update_fields"],
                   use_caching=True)
  post_save = Signal(providing_args=["instance", "raw", "created", "using", "update_fields"], use_caching=True)
  
  pre_delete = Signal(providing_args=["instance", "using"], use_caching=True)
  post_delete = Signal(providing_args=["instance", "using"], use_caching=True)
  
  post_syncdb = Signal(providing_args=["class", "app", "created_models", "verbosity", "interactive"], use_caching=True)
  
  m2m_changed = Signal(providing_args=["action", "instance", "reverse", "model", "pk_set", "using"], use_caching=True)
  