public function next(): void
    {
        if ($this->currentItem instanceof Dropdown) {
            $this->currentDropdownItem = next($this->dropdownItems) ?: null;

            if ($this->currentDropdownItem) {
                return;
            }
        }

        $this->currentItem = next($this->items) ?: null;

        if ($this->currentItem instanceof Dropdown) {
            $this->dropdownItems       = $this->currentItem->items();
            $this->currentDropdownItem = current($this->dropdownItems);
        } else {
            $this->dropdownItems       = [];
            $this->currentDropdownItem = null;
        }
    }
public function next(): void
    {
        if ($this->currentItem instanceof Dropdown) {
            $this->currentDropdownItem = next($this->dropdownItems) ?: null;

            if ($this->currentDropdownItem) {
                return;
            }
        }

        $this->currentItem = next($this->items) ?: null;

        if ($this->currentItem instanceof Dropdown) {
            $this->dropdownItems       = $this->currentItem->items();
            $this->currentDropdownItem = current($this->dropdownItems);
        } else {
            $this->dropdownItems       = [];
            $this->currentDropdownItem = null;
        }
    }
public function next ( ) : void { if ( $ this -> currentItem instanceof Dropdown ) { $ this -> currentDropdownItem = next ( $ this -> dropdownItems ) ? : null ; if ( $ this -> currentDropdownItem ) { return ; } } $ this -> currentItem = next ( $ this -> items ) ? : null ; if ( $ this -> currentItem instanceof Dropdown ) { $ this -> dropdownItems = $ this -> currentItem -> items ( ) ; $ this -> currentDropdownItem = current ( $ this -> dropdownItems ) ; } else { $ this -> dropdownItems = [ ] ; $ this -> currentDropdownItem = null ; } }
Get the nex item.

@return void
Get the nex item .