I'm using a SourceGeneratingCompiler for a custom file type. It produces .java
files. When I right-click a file of the custom type, IDEA correctly invokes my
compiler. However, it seems to ignore the GeneratedItems that I produce, whether
I generate them into /tmp or into a module source folder. It doesn't even see
the generated files until I click Synchronize!
Am I doing something wrong? What is it?