src/Parser/Parser.php
protected function parseArrayAccessor($ls, Node $index, $rs, Accessor $next = null): ArrayAccessor
    {
        return new ArrayAccessor($index, $next);
    }
protected function parseArrayAccessor($ls, Node $index, $rs, Accessor $next = null): ArrayAccessor
    {
        return new ArrayAccessor($index, $next);
    }
ArrayAccessor ::= '[' Statement ']' Accessor?