@Override
    public boolean isAdderMethod(ExecutableElement method) {
        String methodName = method.getSimpleName().toString();

        if (INTERNAL_METHODS.contains(methodName)) {
            return false;
        } else {
            if (isOneOfCaseSelector(method)) {
                return false;
            }
            return super.isAdderMethod(method);
        }
    }
refer <a href="https://github.com/entur/mapstruct-spi-protobuf">mapstruct-spi-protobuf</a>
@author Arne Seime
commons-mapstruct-spi/src/main/java/com/navercorp/pinpoint/mapstruct/spi/ProtobufAccessorNamingStrategy.java