docs: protected ClassCollector createCollector(CompilationUnit unit, SourceUnit su) {
          InnerLoader loader = AccessController.doPrivileged(new PrivilegedAction<InnerLoader>() {
              public InnerLoader run() {
                  return new InnerLoader(GroovyClassLoader.this);
              }
          });
          return new ClassCollector(loader, unit, su);
      }