"RHReliableDatagram" is a manager (an application layer above) that uses the driver, in this case RH_RF95.h, so you still have sleep mode available by making calls through the driver.
"RHReliableDatagram" is a manager (an application layer above) that uses the driver, in this case RH_RF95.h, so you still have sleep mode available by making calls through the driver.