code: func (builder *RequestBuilder) SetTableRanges(tid int64, tableRanges []*ranger.Range, fb *statistics.QueryFeedback) *RequestBuilder {
  	if builder.err != nil {
  		return builder
  	}
  	builder.Request.KeyRanges = TableRangesToKVRanges(tid, tableRanges, fb)
  	return builder
  }
docs: // SetTableRanges sets "KeyRanges" for "kv.Request" by converting "tableRanges"
  // to "KeyRanges" firstly.