public static void initializeHeader(VM_Address ref, Object[] tib, int size, boolean isScalar)
public static void initializeHeader(VM_Address ref, Object[] tib, int size)
  public static void initializeHeader(VM_Address ref, Object[] tib, int size,                                      boolean isScalar)    throws VM_PragmaUninterruptible, VM_PragmaInline {    // nothing here because this is for default allocation, which is    // to the nursery, which requires nothing to be done.  }