I am getting a syntex error when making a UML class in IntelliJ, how can i fix it?

I am making a UML class diagram in IntelliJ with the “Sketch it!” plugin, but it says there is a syntax error in line 5, where it says namespace the first time. I don’t get why, as it says …

How to hide variables from Java’s JDI?

I am instrumenting some classes and introducing some new local variables. Now, when the user places a breakpoint in the code, and execution is stopped, the newly introduced local variables can be seen …