protected ValueStoragePage<T> getOrCreatePage(long pageID) {
		ValueStoragePage<T> page = getPage(pageID);
		if (page == null) {
			page = new ValueStoragePage<T>(pageSize, pageID, getDataSize(), objectClass);
			ht.put(pageID, page);
			propertyPageIndex.add(pageID);
		}
		return page;
	}
Returns property object class associated with this set.
Ghidra/Framework/Generic/src/main/java/ghidra/util/map/ValueMap.java