docs: def remove(self, obj, safe=None):
  		'''
  			Remove a particular object from the database.  If the object has
  			no mongo ID set, the method just returns.  If this is a partial
  			document without the mongo ID field retrieved a ``FieldNotRetrieved``
  			will be raised
  
  			:param obj: the object to save
  			:param safe: whether to wait for the operation to complete.  Defaults \
  				to the session's ``safe`` value.
  		'''
  		if safe is None:
  			safe = self.safe
  		remove = RemoveDocumentOp(self.transaction_id, self, obj, safe)
  		self.queue.append(remove)
  		if self.autoflush:
  			return self.flush()