我在Drupal 8上具有消息模块，并创建了一个标记来标记消息。
我的标志的机器名称为Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project bilbon-core: Compilation failure: Compilation failure:
si/smth/project/bean/CUtil.java:[333,43] constructor JexlEngine in class org.apache.commons.jexl3.JexlEngine cannot be applied to given types;
required: no arguments
found: <nulltype>,si.smth.project.bean.CUtil.MyArithmetic,<nulltype>,<nulltype>
reason: actual and formal argument lists differ in length
si/smth/project/bean/CUtil.java:[333,99] <anonymous si.smth.project.bean.CUtil$1> is not abstract and does not override abstract method newInstance(java.lang.String,java.lang.Object...) in org.apache.commons.jexl3.JexlEngine
si/smth/project/bean/CUtil.java:[336,13] cannot find symbol
symbol: method setCache(int)
location: variable jexl of type org.apache.commons.jexl3.JexlEngine
si/smth/project/bean/CUtil.java:[337,13] cannot find symbol
如何在我的消息上显示Flag令牌（标记和标记的链接）？
这是mark_message中的代码，但没有结束：
message_activity_stream.tokens.inc