[ Version ( since = "2.16" ) ]
public string tooltip_markup { owned get; set; }
Sets the text of tooltip to be the given string, which is marked up with the Pango text markup language.
Also see set_markup.
This is a convenience property which will take care of getting the tooltip shown if the given string is not null. has_tooltip will automatically be set to true and the default handler for the query_tooltip signal will take care of displaying the tooltip.
On some platforms, embedded markup will be ignored.