Result (Expression @NotNull [] params, ExpressionContext context) { Project project = context.getProject(); Editor editor = context.getEditor(); if (editor != null) { PsiFile file = PsiDocumentManager.getInstance(project).getPsiFile(editor.getDocument()); if (file != null) { VirtualFile virtualFile = file.getVirtualFile(); if (virtualFile != null) { return calculateResult(virtualFile, project); } } } return null; }