Add several Menu using internal services and models.

[pouyababaie]

Is there an existing issue for this?

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Is your feature request related to a problem? Please describe the problem.

im trying to create a sidemenu beside the exsiting one , my layout demands a secondary sidemenu that i want it to use the same functionaliy of exsitsnig MainMenu , MenuProvider , and IMenuManager.

i created a sidemenucontributer for that matter but there was no documentation to manually use the new menu contributer instread of the main one.

i put an image to show my need better :

sorry beforehand for weak illustration

the red lines are the menu item i want to be added by the new menu contributer
i alreadt created the layout and a customsidemenuComponent for it but i dont know how to add the new menuItem list to it

the customsidemenuComponent inherits MainHeader component from lepton Theme but it does not get a Menu parameter.

Describe the solution you'd like

if there would be a service that get the contributor and returned a list of menu item , it would ease the process a lot.

currently i was unable to find any suitable docs for this need.

i genuinely accepts any thoughts on this.

Thanks !

Additional context

No response