public boolean isDescendant(Message other)
    {
        if (parentMessage == null)
            return false;
        return parentMessage == other || parentMessage.isDescendant(other);
    }
Represents the message defined in the {@link Proto}.

@author David Yu
@created Dec 19, 2009
protostuff-parser/src/main/java/io/protostuff/parser/Message.java