boolean (@NotNull JavaSliceBuilder builder, @NotNull Processor<? super SliceUsage> processor, @NotNull PsiElement foreignElement) { PsiFile file = foreignElement.getContainingFile(); if (file != null && file.getLanguage() != JavaLanguage.INSTANCE) { // show foreign language usage as leaf to warn about possible (but unknown to us) flow. return builder.process(foreignElement, processor); } return true; }