if (start.loadInt() == ALIGNMENT_VALUE) {
if ((start.loadInt() & ALIGNMENT_MASK) == ALIGNMENT_MASK) {
  public static ObjectReference getObjectFromStartAddress(Address start) {    if (start.loadInt() == ALIGNMENT_VALUE) {      start = start.plus(BYTES_IN_INT);      if (start.loadInt() == ALIGNMENT_VALUE) {        return ObjectReference.nullReference();      }    }    return start.plus(OBJECT_REF_OFFSET).toObjectReference();   }