public static function GetParamValues($obj, $operation, $customExcludes = array())
 {
     $arr = "excludeFrom{$operation}";
     return MapperHelper::GetParamValues($obj, $operation, self::$mapping, array_merge(self::${$arr}, $customExcludes));
 }
 public static function GetParamValues($obj, $operation, $customExcludes = array())
 {
     $arr = "excludeFrom{$operation}";
     $keys = array('world_id', 'hex_x', 'hex_y');
     return MapperHelper::GetParamValues($obj, $operation, self::$mapping, array_merge(self::${$arr}, $customExcludes), $keys);
 }