@Override
  protected DeclarableType fromNonNullConfigObject(ClassName configObject) {
    return new DeclarableType(configObject.getClassName(), configObject.getInitProperties());
  }
this converts between ClassName and DeclarableType (xml domain object). Only string type
parameter in the DeclarableType will be converted as initialization properties.
geode-core/src/main/java/org/apache/geode/management/internal/configuration/converters/ClassNameConverter.java