setTooltipText
Sets @text as the contents of the tooltip.
If @text contains any markup, it will be escaped.
This function will take care of setting property@Gtk.Widget:has-tooltip as a side effect, and of the default handler for the signal@Gtk.Widget::query-tooltip signal.
See also method@Gtk.Tooltip.set_text.
Parameters
text
the contents of the tooltip for @widget