位置 place
转换 transform
守卫 Guard
目前就下面三个
'transition.转换名.' + 'can' or 'apply.before' or 'apply.before'
$guard->addGuard('to_pay', 'can', function (object $obj, $transform) {
return true;
});
graphviz 下载 https://graphviz.gitlab.io/download/
$grap = new GraphvizDumper();
file_put_contents('tmp.dot', $grap->dump($def->build()));
dot -Tpng -o tmp.png tmp.dot
https://github.com/symfony/workflow