private static long computeMsgId(MsgNode msgNode) {
    return SoyMsgIdComputer.computeMsgId(
        buildMsgParts(msgNode), msgNode.getMeaning(), msgNode.getContentType());
  }
private static long computeMsgId ( MsgNode msgNode ) { return SoyMsgIdComputer . computeMsgId ( buildMsgParts ( msgNode ) , msgNode . getMeaning ( ) , msgNode . getContentType ( ) ) ; }
Computes the unique message id for the given MsgNode.

@param msgNode The message parsed from the Soy source.
@return The message id.