code: func (vv *VectorisedView) TrimFront(count int) {
  	for count > 0 && len(vv.views) > 0 {
  		if count < len(vv.views[0]) {
  			vv.size -= count
  			vv.views[0].TrimFront(count)
  			return
  		}
  		count -= len(vv.views[0])
  		vv.RemoveFirst()
  	}
  }
docs: // TrimFront removes the first "count" bytes of the vectorised view.