private void verifyNoNormalizers(String where, ExpressionFunction func, Map<String, RankFeatureNormalizer> allNormalizers, RankProfileTransformContext context) {
        if (func == null) return;
        var body = func.getBody();
        if (body == null) return;
        verifyNoNormalizers(where, body.getRoot(), allNormalizers, context);
    }
Returns the path type, if valuePath is set.
config-model/src/main/java/com/yahoo/schema/RankProfile.java