public Varnode getVarnode(int spaceID, long offset, int size) {
		AddressSpace space = addrFactory.getAddressSpace(spaceID);
		Address target = space.getTruncatedAddress(offset, true);
		Varnode vt = new Varnode(target, size);
		return vt;
	}
return the location that this varnode was last set
This is a transient thing, so it should only be used as a particular flow is being processed...

@param rvar the register varnode
@param bval this parameter is unused.
@return address that the register was set.
Ghidra/Features/Base/src/main/java/ghidra/program/util/VarnodeContext.java