<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _raveled_index_for(self, param):
 """ get the raveled index for a param that is an int array, containing the indexes for the flattened param inside this parameterized logic. !Warning! be sure to call this method on the highest parent of a hierarchy, as it uses the fixes to do its work """

        from ..param import ParamConcatenation
        if isinstance(param, ParamConcatenation):
            return np.hstack((self._raveled_index_for(p) for p in param.params))
        return param._raveled_index() + self._offset_for(param)