<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _get_var_name(self, name, fresh=False):
 """Get variable name. """

        if name not in self._var_name_mappers:
            self._var_name_mappers[name] = VariableNamer(name)

        if fresh:
            var_name = self._var_name_mappers[name].get_next()
        else:
            var_name = self._var_name_mappers[name].get_current()

        return var_name