def METHOD_NAME(self, *args):
    self.spices.send_proxy_signal('highlightPanel', '(ib)', self.panel_id, False)
    if self.current_panel_index - 1 >= 0:
        self.current_panel_index -= 1
    else:
        self.current_panel_index = len(self.panels) - 1
    self.panel_id = int(self.panels[self.current_panel_index].split(":")[0])
    self.spices.send_proxy_signal('highlightPanel', '(ib)', self.panel_id, True)