public void flowToAddress(Address fromAddr, Address toAddr) {
		// make sure address in same space as from, might be in an overlay
		toAddr = fromAddr.getAddressSpace().getOverlayAddress(toAddr);
		currentAddress = toAddr;

		ArrayList<Address> arrayList = flowToFromLists.get(toAddr);
		if (arrayList == null) {
			arrayList = new ArrayList<Address>();
			flowToFromLists.put(fromAddr, arrayList);
		}
		arrayList.add(fromAddr);
	}
Records flow from/to basic blocks, or non-fallthru flow
Ghidra/Features/Base/src/main/java/ghidra/program/util/VarnodeContext.java