src/TransitionAwareTrait.php
protected function _setTransition($transition)
    {
        $this->transition = ($transition === null)
            ? null
            : $this->_normalizeStringable($transition);
    }
protected function _setTransition($transition)
    {
        $this->transition = ($transition === null)
            ? null
            : $this->_normalizeStringable($transition);
    }
protected function _setTransition ( $ transition ) { $ this -> transition = ( $ transition === null ) ? null : $ this -> _normalizeStringable ( $ transition ) ; }
Sets the transition for with this instance.

@since [*next-version*]

@param string|Stringable|null $transition The transition.
Sets the transition for with this instance .