@Override
    public String getElementName(ExecutableElement adderMethod) {

        String methodName = super.getElementName(adderMethod);
        if (isMethodFromProtobufGeneratedClass(adderMethod)) {
            String singularizedMethodName = Nouns.singularize(methodName);
            methodName = singularizedMethodName;
        }

        return methodName;
    }
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