code: func (builder *RequestBuilder) SetTableHandles(tid int64, handles []int64) *RequestBuilder {
  	builder.Request.KeyRanges = TableHandlesToKVRanges(tid, handles)
  	return builder
  }
docs: // SetTableHandles sets "KeyRanges" for "kv.Request" by converting table handles
  // "handles" to "KeyRanges" firstly.