How to add a extra dropdown for Panels

[marcepoblet]

I see that in GrapesJs we can add buttons in the Panels, like this:

var newButton = panelManager.addButton('myNewPanel',{
  id: 'myNewButton',
  className: 'someClass',
  command: 'someCommand',
  attributes: { title: 'Some title'},
  active: false,
});

but i would need to know if we can add a dropdown in the Panels? something like the devices