public function service( $service, $subject, $predicate = null, $object = null ) {
		$this->graphBuilder->service( $service, $subject, $predicate, $object );
		return $this;
	}
public function service( $service, $subject, $predicate = null, $object = null ) {
		$this->graphBuilder->service( $service, $subject, $predicate, $object );
		return $this;
	}
public function service ( $ service , $ subject , $ predicate = null , $ object = null ) { $ this -> graphBuilder -> service ( $ service , $ subject , $ predicate , $ object ) ; return $ this ; }
Adds the given graph or triple as an service condition.

@param string|GraphBuilder $subject
@param string|null $predicate
@param string|null $object
@return self
@throws InvalidArgumentException
Adds the given graph or triple as an service condition .