public DynamicMessage.Builder newMessageBuilder(String msgTypeName) {
        Descriptors.Descriptor msgType = getMessageDescriptor(msgTypeName);
        if (msgType == null) {
            return null;
        }
        return DynamicMessage.newBuilder(msgType);
    }
Creates a new dynamic message builder for the given message type

@param msgTypeName the message type name
@return the message builder (null if not found)
core/src/main/java/kafka/automq/table/deserializer/proto/schema/DynamicSchema.java