void (@NotNull PsiMethodCallExpression call) { if (!OptionalUtil.OPTIONAL_OF_NULLABLE.matches(call)) return; PsiExpression arg = PsiUtil.skipParenthesizedExprDown(ArrayUtil.getFirstElement(call.getArgumentList().getExpressions())); if (arg == null) return; DfType type = CommonDataflow.getDfType(arg); processArgument(type, arg); }