src/Client.php
public function addParser(ParserInterface $parser)
    {
        $this->parsers = [(string) $parser => $parser] + $this->parsers;

        return $this;
    }
public function addParser(ParserInterface $parser)
    {
        $this->parsers = [(string) $parser => $parser] + $this->parsers;

        return $this;
    }
Add parser to the beginning of parsers list

@param ParserInterface $parser
@return $this