boolean (@Nullable AnActionEvent e) { if (e == null) return false; final PsiFile psiFile = getPsiFile(e); if (psiFile == null) return false; if (!XsltSupport.isXsltFile(psiFile)) return false; final Project project = getEventProject(e); if (project == null) return false; return PsiManager.getInstance(project).isInProject(psiFile); }