private List<BitGroup> getBitGroups() {
		if (bitGroups == null) {
			bitGroups = EnumValuePartitioner.partition(getValues(), getLength());
		}
		return bitGroups;
	}
Database implementation for the enumerated data type.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/data/EnumDB.java