private boolean isServiceChangedCCCD(@Nullable final BluetoothGattDescriptor descriptor) {
		return descriptor != null &&
				BleManager.SERVICE_CHANGED_CHARACTERISTIC.equals(descriptor.getCharacteristic().getUuid());
	}
Returns true if this descriptor is from the Service Changed characteristic.

@param descriptor the descriptor to be checked
@return true if the descriptor belongs to the Service Changed characteristic
ble/src/main/java/no/nordicsemi/android/ble/BleManagerHandler.java