Return Action With Sticky Notification in Odoo15

return_action_with_sticky_notification_odoo.py

def cmd_send_notification(self):
    action = self.env.ref('module_name.id_of_custom_action_window')
    return {
        'type': 'ir.actions.client',
        'tag': 'display_notification',
        'params': {
            'title': _('Your Custom Notification Title'),
            'message':  '%s',
            'links': [{
                'label': self.customer_id.name,
                'url': f'#action={action.id}&id={self.customer_id.id}&model=res.partner',
            }],
            'sticky': False,
            'next': {
                'type': 'ir.actions.act_window',
                'res_model': 'res.partner',
                'res_id': self.customer_id.id,
                'views': [(False,'form')]
            },
        }
    }