@Override
    public void fromData(DataInput in,
        DeserializationContext context) throws IOException, ClassNotFoundException {
      super.fromData(in, context);
      profile = DataSerializer.readObject(in);
    }
If this processor being used by controller then return ALL members; otherwise defer to super.

@return a Set of the current members
@since GemFire 5.7
geode-core/src/main/java/org/apache/geode/internal/cache/UpdateAttributesProcessor.java