src/Api/Page.php
public function setSubpages($var)
    {
        $arr = GPBUtil::checkRepeatedField($var, \Google\Protobuf\Internal\GPBType::MESSAGE, \Google\Api\Page::class);
        $this->subpages = $arr;

        return $this;
    }
public function setSubpages($var)
    {
        $arr = GPBUtil::checkRepeatedField($var, \Google\Protobuf\Internal\GPBType::MESSAGE, \Google\Api\Page::class);
        $this->subpages = $arr;

        return $this;
    }
Subpages of this page. The order of subpages specified here will be
honored in the generated docset.

Generated from protobuf field <code>repeated .google.api.Page subpages = 3;</code>
@param \Google\Api\Page[]|\Google\Protobuf\Internal\RepeatedField $var
@return $this