public static function convert(Anchor $protobufAnchor)
    {
        $anchorMap = null;
        $ASN1 = new ASN1();
        $X509 = new X509();
        $anchorSubType = $protobufAnchor->getSubType();
        $yotiSignedTimeStamp = self::convertToYotiSignedTimestamp($protobufAnchor);
        $X509CertsList = self::convertCertsListToX509($X509, $protobufAnchor->getOriginServerCerts());
        $anchorTypesMap = self::getAnchorTypesMap();

        foreach ($X509CertsList as $certX509Obj) {
            $certExtsArr = $certX509Obj->tbsCertificate->extensions;

            foreach ($anchorTypesMap as $oid => $anchorType) {
                foreach ($certExtsArr as $extObj) {
                    $extArr = (array) $extObj;
                    $oidFound = array_search($oid, $extArr, true);
                    if ($oidFound !== false && is_string($extArr['extnValue'])) {
                        $extEncodedValue = $extArr['extnValue'];

                        if ($decodedAnchorValue = self::decodeAnchorValue($ASN1, $X509, $extEncodedValue)) {
                            $yotiAnchor = self::createYotiAnchor(
                                $decodedAnchorValue,
                                $anchorType,
                                $anchorSubType,
                                $yotiSignedTimeStamp,
                                $X509CertsList
                            );
                            $anchorMap = [
                                'oid' => $oid,
                                'yoti_anchor' => $yotiAnchor
                            ];
                            // We are only looking for one YotiAnchor from protobufAnchor
                            return $anchorMap;
                        }
                    }
                }
            }
        }
        return $anchorMap;
    }