Asset/src/V1beta1/BatchGetAssetsHistoryRequest.php
public function setReadTimeWindow($var)
    {
        GPBUtil::checkMessage($var, \Google\Cloud\Asset\V1beta1\TimeWindow::class);
        $this->read_time_window = $var;

        return $this;
    }
public function setReadTimeWindow($var)
    {
        GPBUtil::checkMessage($var, \Google\Cloud\Asset\V1beta1\TimeWindow::class);
        $this->read_time_window = $var;

        return $this;
    }
public function setReadTimeWindow ( $ var ) { GPBUtil :: checkMessage ( $ var , \ Google \ Cloud \ Asset \ V1beta1 \ TimeWindow :: class ) ; $ this -> read_time_window = $ var ; return $ this ; }
Optional. The time window for the asset history. Both start_time and
end_time are optional and if set, it must be after 2018-10-02 UTC. If
end_time is not set, it is default to current timestamp. If start_time is
not set, the snapshot of the assets at end_time will be returned. The
returned results contain all temporal assets whose time window overlap with
read_time_window.

Generated from protobuf field <code>.google.cloud.asset.v1beta1.TimeWindow read_time_window = 4;</code>
@param \Google\Cloud\Asset\V1beta1\TimeWindow $var
@return $this
Optional . The time window for the asset history . Both start_time and end_time are optional and if set it must be after 2018 - 10 - 02 UTC . If end_time is not set it is default to current timestamp . If start_time is not set the snapshot of the assets at end_time will be returned . The returned results contain all temporal assets whose time window overlap with read_time_window .