code: def _get_var_name(self, name, fresh=False):
          
          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
docs: Get variable name.