public boolean isUnique() {
		int type = AddressSpace.ID_TYPE_MASK & spaceID;
		return (type == AddressSpace.TYPE_UNIQUE);
	}
@return true if this varnode doesn't exist anywhere.  A temporary variable.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/pcode/Varnode.java