HI i am trying to understand ble_app_uart_c central code . how does the Event handlers are handled? and from where does the nrf_ble_scan_on_ble_evt gets input? Please reply

[Rekha]

#define NRF_BLE_SCAN_DEF(_name)                            \

    static nrf_ble_scan_t _name;                           \

    NRF_SDH_BLE_OBSERVER(_name ## _ble_obs,                \

                         NRF_BLE_SCAN_OBSERVER_PRIO,       \

                         nrf_ble_scan_on_ble_evt, &_name); \

[Rekha]

please explain posted snippet