<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def set_pane_position(self, config_id):
 """Adjusts the position of a GTK Pane to a value stored in the runtime config file. If there was no value stored, the pane's position is set to a default value. :param config_id: The pane identifier saved in the runtime config file """

        default_pos = constants.DEFAULT_PANE_POS[config_id]
        position = global_runtime_config.get_config_value(config_id, default_pos)
        pane_id = constants.PANE_ID[config_id]
        self.view[pane_id].set_position(position)