public Collection<String> getTypeNamesForImportStatements() {
        return getTypeNamesForImportStatements(thisType);
    }
Helper for collecting referenced non simple types as these usually need to be
imported in some way.

@return Collection of all non simple type references used in fields or enum constants.
code-generation/language-c/src/main/java/org/apache/plc4x/language/c/CLanguageTemplateHelper.java