#fixed code
                                private void setProperties(List<Property<String, Object>> propertyList, Object instance) {
        ClassInfo classInfo = metadata.classInfo(instance);

        getCompositeProperties(propertyList, classInfo).forEach( (field, v) -> field.write(instance, v));

        for (Property<?, ?> property : propertyList) {
            writeProperty(classInfo, instance, property);
        }
    }
#vulnerable code 
                                private void setProperties(List<Property<String, Object>> propertyList, Object instance) {
        ClassInfo classInfo = metadata.classInfo(instance);

        Collection<FieldInfo> compositeFields = classInfo.fieldsInfo().compositeFields();
        if (compositeFields.size() > 0) {
            Map<String, ?> propertyMap = toMap(propertyList);
            for (FieldInfo field : compositeFields) {
                CompositeAttributeConverter<?> converter = field.getCompositeConverter();
                Object value = converter.toEntityAttribute(propertyMap);
                FieldInfo writer = classInfo.getFieldInfo(field.getName());
                writer.write(instance, value);
            }
        }

        for (Property<?, ?> property : propertyList) {
            writeProperty(classInfo, instance, property);
        }
    } 
                            #location 4 
                            #vulnerability type NULL_DEREFERENCE