private static function getReferencePrefix(string $storeAs) : string
    {
        if (! in_array($storeAs, [self::REFERENCE_STORE_AS_REF, self::REFERENCE_STORE_AS_DB_REF, self::REFERENCE_STORE_AS_DB_REF_WITH_DB])) {
            throw new LogicException('Can only get a reference prefix for DBRef and reference arrays');
        }

        return $storeAs === self::REFERENCE_STORE_AS_REF ? '' : '$';
    }
private static function getReferencePrefix(string $storeAs) : string
    {
        if (! in_array($storeAs, [self::REFERENCE_STORE_AS_REF, self::REFERENCE_STORE_AS_DB_REF, self::REFERENCE_STORE_AS_DB_REF_WITH_DB])) {
            throw new LogicException('Can only get a reference prefix for DBRef and reference arrays');
        }

        return $storeAs === self::REFERENCE_STORE_AS_REF ? '' : '$';
    }
private static function getReferencePrefix ( string $ storeAs ) : string { if ( ! in_array ( $ storeAs , [ self :: REFERENCE_STORE_AS_REF , self :: REFERENCE_STORE_AS_DB_REF , self :: REFERENCE_STORE_AS_DB_REF_WITH_DB ] ) ) { throw new LogicException ( 'Can only get a reference prefix for DBRef and reference arrays' ) ; } return $ storeAs === self :: REFERENCE_STORE_AS_REF ? '' : '$' ; }
Returns the reference prefix used for a reference
Returns the reference prefix used for a reference