@Override
		public Reference next() {
			try {
				if (hasNext()) {
					return getRef(recIter.next());
				}
			}
			catch (IOException e) {
				program.dbError(e);
			}
			return null;
		}
Construct reference list for existing record
@param rec existing refList record
@param adapter entry record storage adapter
@param addrMap address map for encoding/decoding addresses
@param program associated Program
@param cache RefList object cache
@param isFrom true for from-adapter use, false for to-adapter use
@throws IOException if database IO error occurs
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/references/BigRefListV0.java