New Test
open /run/com.vaadin.tests.components.customcomponent.CustomComponentHideContent?restartApplication
click vaadin=runcomvaadintestscomponentscustomcomponentCustomComponentHideContent::/VVerticalLayout[0]/VOrderedLayout$Slot[1]/VVerticalLayout[0]/VOrderedLayout$Slot[1]/VButton[0]/domChild[0]/domChild[0]
assertElementNotPresent vaadin=runcomvaadintestscomponentscustomcomponentCustomComponentHideContent::/VVerticalLayout[0]/VOrderedLayout$Slot[1]/VVerticalLayout[0]/VOrderedLayout$Slot[0]/VCustomComponent[0]/VLabel[0]
click vaadin=runcomvaadintestscomponentscustomcomponentCustomComponentHideContent::/VVerticalLayout[0]/VOrderedLayout$Slot[1]/VVerticalLayout[0]/VOrderedLayout$Slot[1]/VButton[0]/domChild[0]/domChild[0]
assertText vaadin=runcomvaadintestscomponentscustomcomponentCustomComponentHideContent::/VVerticalLayout[0]/VOrderedLayout$Slot[1]/VVerticalLayout[0]/VOrderedLayout$Slot[0]/VCustomComponent[0]/VLabel[0] This is the content