Notebook.insertPage

int insertPage(gtk.widget.Widget child, gtk.widget.Widget tabLabel, int position)

Insert a page into notebook at the given position.

`child`	the [gtk.widget.Widget] to use as the contents of the page
`tabLabel`	the [gtk.widget.Widget] to be used as the label for the page, or null to use the default label, “page N”
`position`	the index (starting at 0) at which to insert the page, or -1 to append the page after all other pages

the index (starting from 0) of the inserted

page in the notebook, or -1 if function fails