public function addDefaultVisitors(): Http20Builder
    {
        if ($this->addedDefaultVisitors) {
            return $this;
        }

        $this->addedDefaultVisitors = true;

        $this->addVisitor(new AddExpirationHeaderVisitor());
        $this->addVisitor(new AddPriorityHeaderVisitor());
        $this->addVisitor(new AddApnIdHeaderVisitor());
        $this->addVisitor(new AddCollapseIdHeaderVisitor());

        return $this;
    }
public function addDefaultVisitors(): Http20Builder
    {
        if ($this->addedDefaultVisitors) {
            return $this;
        }

        $this->addedDefaultVisitors = true;

        $this->addVisitor(new AddExpirationHeaderVisitor());
        $this->addVisitor(new AddPriorityHeaderVisitor());
        $this->addVisitor(new AddApnIdHeaderVisitor());
        $this->addVisitor(new AddCollapseIdHeaderVisitor());

        return $this;
    }
public function addDefaultVisitors ( ) : Http20Builder { if ( $ this -> addedDefaultVisitors ) { return $ this ; } $ this -> addedDefaultVisitors = true ; $ this -> addVisitor ( new AddExpirationHeaderVisitor ( ) ) ; $ this -> addVisitor ( new AddPriorityHeaderVisitor ( ) ) ; $ this -> addVisitor ( new AddApnIdHeaderVisitor ( ) ) ; $ this -> addVisitor ( new AddCollapseIdHeaderVisitor ( ) ) ; return $ this ; }
Add default visitors

@return Http20Builder

@deprecated This method is deprecated and will be a move to private scope.
Please do not use this method in your code.
This method will be called from the constructor of this builder.
Add default visitors