private final void filter(VM_Address obj, AddressDequeue tgt) {
private final void filter(VM_Address obj, AddressDeque tgt) {
  private final void filter(VM_Address obj, AddressDequeue tgt) {    if (VM_Interface.VerifyAssertions)      VM_Interface._assert(!RCBaseHeader.isGreen(obj));    if (VM_Interface.VerifyAssertions)      VM_Interface._assert(RCBaseHeader.isBuffered(obj));    if (RCBaseHeader.isLiveRC(obj)) {      if (RCBaseHeader.isPurple(obj)) {	tgt.insert(obj);      } else {	RCBaseHeader.clearBufferedBit(obj);      }    } else {      RCBaseHeader.clearBufferedBit(obj);      freeBuffer.push(obj);    }  }