@Override
		public Address next() {
			findNext();
			if (currentAddress != null) {
				Address addr = currentAddress;
				currentAddress = null;
				return addr;
			}
			return null;
		}
Construct a reference iterator sorted on the from address.
@param set set of from addresses
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/references/ReferenceDBManager.java