docs: function _full_delete(hash, key1, key2){
  	    if( key1 && key2 && hash &&
  		hash[key1] && hash[key1][key2] ){
  		    delete hash[key1][key2];
  		}
  	    if( bbop.core.is_empty(hash[key1]) ){
  		delete hash[key1];
  	    }
  	}