@Override
    public int getOpCode() {
        return mOpCode;
    }
Constructs VendorModelMessageAcked message.

@param appKey            {@link ApplicationKey} for this message
@param modelId           32-bit Model identifier
@param companyIdentifier 16-bit Company identifier of the vendor model
@throws IllegalArgumentException if any illegal arguments are passed
mesh/src/main/java/no/nordicsemi/android/mesh/transport/VendorModelMessageAcked.java