@Override
	public ReferenceIterator getExternalReferences() {
		AddressSet set = new AddressSet(AddressSpace.EXTERNAL_SPACE.getMinAddress(),
			AddressSpace.EXTERNAL_SPACE.getMaxAddress());
		AddressIterator it = getReferenceDestinationIterator(set, true);
		return new ExternalReferenceIterator(it);
	}
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