code: @Override
  	public Integer execute() {
  		logger.fine("Executing [AppEngineDelete] command");
  		GetList<E> command = session.get(metamodel);
  		
  		if (filters != null) {
  			command.filter(filters.toArray(new Filter<?>[] {}));
  		}
  		
  		int i = 0;
  		
  		for (E entity : command.execute()) {
  			session.delete(entity);
  			i++;
  		}
  		
  		return i;
  	}
docs: Executes {@code AppEngineDelete} with {@code AppEngineDatastoreSession}.
  
  @return The number of deleted entity.