typedef struct {
  vm_bt_gatt_register_server_callback register_server;
  vm_bt_gatt_connection_callback connection;
  vm_bt_gatt_listen_callback listen;
  vm_bt_gatt_service_added_callback service_added;
  vm_bt_gatt_included_service_added_callback included_service_added;
  vm_bt_gatt_characteristic_added_callback characteristic_added;
  vm_bt_gatt_descriptor_added_callback descriptor_added;
  vm_bt_gatt_service_started_callback service_started;
  vm_bt_gatt_service_stopped_callback service_stopped;
  vm_bt_gatt_service_deleted_callback service_deleted;
  vm_bt_gatt_request_read_callback request_read;
  vm_bt_gatt_request_write_callback request_write;
  vm_bt_gatt_request_exec_write_callback request_exec_write;
  vm_bt_gatt_response_confirmation_callback response_confirmation;
  vm_bt_gatt_read_tx_power_callback read_tx_power;
} vm_bt_gatt_server_callback_t;