/* Check whether a channels can be used by an application.  */
__STATIC_INLINE bool are_app_channels(uint32_t channel_mask)
/* Check whether a channels can be used by an application.  */
__STATIC_INLINE bool are_app_channels(uint32_t channel_mask)
{
    return ((~(NRF_PPI_ALL_APP_CHANNELS_MASK) & channel_mask) == 0);
}