src/Versatile/Query/SyntaxParser.php
public function toJoinAndKey($path)
    {

        if(!$this->isRelatedKey($path)){
            return ['', $path];
        }

        $stack = $this->splitPath($path);

        $prop = array_pop($stack);

        return [implode($this->joinDelimiter, $stack), $prop];

    }
public function toJoinAndKey($path)
    {

        if(!$this->isRelatedKey($path)){
            return ['', $path];
        }

        $stack = $this->splitPath($path);

        $prop = array_pop($stack);

        return [implode($this->joinDelimiter, $stack), $prop];

    }
{@inheritdoc}

@param string $path Der Name der Eigenschaft
@return array Sowas: array('join.join','id')