https://github.com/plutext/docx4j/blob/ ... lEdit.java
// If we know the itemId ....
String itemId = "{5448916C-134B-45E6-B8FE-88CC1FFC17C3}".toLowerCase();
CustomXmlDataStoragePart customXmlDataStoragePart = (CustomXmlDataStoragePart)wordMLPackage.getCustomXmlDataStorageParts().get(itemId);
// .. if you don't know the itemId (which you can get using ContentControlsPartsInfo),
I'm still confused on how to get the itemId and I can't seem to find any real info on the "ContentControlsPartsInfo"
I've created an example word file (attached) and using the OpenDOPE authoring ...