IntentionPreviewInfo (@NotNull Project project, @NotNull ProblemDescriptor previewDescriptor) { PsiMethodReferenceExpression methodRef = ObjectUtils.tryCast(previewDescriptor.getPsiElement(), PsiMethodReferenceExpression.class); if (methodRef == null) { return IntentionPreviewInfo.EMPTY; } LambdaRefactoringUtil.convertMethodReferenceToLambda(methodRef, false, true); return IntentionPreviewInfo.DIFF; }