@Override
		public int compareTo(ResolvePair o) {
			long r = resolvedDt.getKey() - o.resolvedDt.getKey();
			if (r == 0) {
				return 0;
			}
			if (r < 0) {
				return -1;
			}
			return 1;
		}
Set of {@link AbstractIntegerDataType} IDs whose removal has been blocked
to allow persistence of defined bitfields.  
See {@link #blockDataTypeRemoval(AbstractIntegerDataType)}
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/data/DataTypeManagerDB.java