public boolean isConstantNonPointer(Varnode vn) {
		if (!vn.isConstant()) {
			return false;
		}
		if (vn.getSize() != pointerSize) {
			return true;
		}
		long off = vn.getOffset();
		return (off >= 0 && off <= pointerMin);
	}
Determine if the given Varnode is a constant and not a pointer.
A constant is only considered a pointer if it has the size of a pointer and
the constant value is not too "small".
@param vn is the Varnode to check
@return true if the constant is constant and not a pointer
Ghidra/Features/CodeCompare/src/main/java/ghidra/features/codecompare/graphanalysis/DataGraph.java