How to save the current component in stackview and push it back at onclick event from any other component

[AICT_Radhika]

1. I push the component via its url as,
   stack_view.push("Menu.qml")
   2 . I push this component from many other components.
   3 . In Menu.qml ,there is Close Button. On 'the Close Button' click I need to go back to the base component from which the Menu.qml is pushed to stack.
   4 . So my questions are,
   a. How to save the current component before pushing the Menu.qml in to the stack?
   b.How to push again/pop to the previous component(saved in first question)?