public function append($label): self
    {
        $label = $this->filterComponent($label);
        if (null === $label) {
            return $this;
        }

        return new self($this->getContent().self::SEPARATOR.$label);
    }
public function append($label): self
    {
        $label = $this->filterComponent($label);
        if (null === $label) {
            return $this;
        }

        return new self($this->getContent().self::SEPARATOR.$label);
    }
public function append ( $ label ) : self { $ label = $ this -> filterComponent ( $ label ) ; if ( null === $ label ) { return $ this ; } return new self ( $ this -> getContent ( ) . self :: SEPARATOR . $ label ) ; }
Appends a label to the host.
Appends a label to the host .