void (@NotNull PsiMethodReferenceExpression methodRef) { if (!OptionalUtil.OPTIONAL_OF_NULLABLE.methodReferenceMatches(methodRef)) return; CommonDataflow.DataflowResult dfr = CommonDataflow.getDataflowResult(methodRef); if (dfr == null) return; PsiElement anchor = methodRef.getReferenceNameElement(); if (anchor == null) return; DfType type = dfr.getDfType(new JavaMethodReferenceArgumentAnchor(methodRef)); processArgument(type, anchor); }