@Override
		public boolean hasNext() {
			try {
				return keyIter.hasNext();
			}
			catch (IOException e) {
				errHandler.dbError(e);
			}
			return false;
		}
@see ghidra.program.model.address.AddressIterator#hasNext()
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/references/ToAdapterV1.java