private boolean isUnsupportedMap(PropertyMap<?> map) {
		if (map == null) {
			return false;
		}
		Class<?> valueClass = map.getValueClass();
		return valueClass == null || GenericSaveable.class.equals(valueClass);
	}
Constructs a user defined properties merger.
@param listingMergeMgr the listing merge manager that owns this merger.
Ghidra/Features/Base/src/main/java/ghidra/app/merge/listing/UserDefinedPropertyMerger.java