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

        return $this;
    }
public function setExtensions($var)
    {
        $arr = GPBUtil::checkRepeatedField($var, \Google\Protobuf\Internal\GPBType::MESSAGE, \Google\Protobuf\Any::class);
        $this->extensions = $arr;

        return $this;
    }
Application specific response metadata. Must be set in the first response
for streaming APIs.

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