code: func (a *IntsRef) Grow(newLength int) {
  	assert(a.Offset == 0)
  	if len(a.Ints) < newLength {
  		a.Ints = GrowIntSlice(a.Ints, newLength)
  	}
  }
docs: /*
  Used to grow the reference slice.
  
  In general this should not be used as it does not take the offset into account.
  */