QPDFAcroFormDocumentHelper::invalidateCache()
{
    this->m->cache_valid = false;
    this->m->field_to_annotations.clear();
    this->m->annotation_to_field.clear();
}
QPDFAcroFormDocumentHelper::invalidateCache()
{
    this->m->cache_valid = false;
    this->m->field_to_annotations.clear();
    this->m->annotation_to_field.clear();
}