public static final int resetGCBitsForCopy(VM_Address fromObj, int forwardingWord, int bytes) {
public static final VM_Word resetGCBitsForCopy(VM_Address fromObj, VM_Word forwardingWord, int bytes) {
  public static final int resetGCBitsForCopy(VM_Address fromObj,                                              int forwardingWord, int bytes) {    if (VM_Interface.VerifyAssertions) VM_Interface._assert(false);  // not a copying collector!    return forwardingWord;  }