A visual separator for the parent menu of Actions.
import pyblish.apiclass OpenInExplorer(pyblish.api.Action):label = "Open in Explorer"on = "failed" plug-inicon = "hand-o-up"def process(self, context):import subprocesssubprocess.call("start .", shell=True)class Validate(pyblish.api.Validator):actions = [# Order of items is preservedpyblish.api.Category("My Actions"),MyAction,pyblish.api.Separator,]def process(self, context, plugin):raise Exception("Failed")