@Override
    public int getOpCode() {
        return OP_CODE;
    }
Scheduler Action Get is an acknowledged message used to report the action defined by the entry of
the Schedule Register state of an element (see Mesh Model Spec. v1.0.1 Section 5.1.4.2), identified by the Index field.
<p>
The response to the Scheduler Action Get message is a Scheduler Action Status message.

@param appKey the appkey
@param index  Index of the Schedule Register entry to get
mesh/src/main/java/no/nordicsemi/android/mesh/transport/SchedulerActionGet.java