Sets the text of the tooltip to be markup, which is marked up with the Pango text markup language. If markup is NULL, the label will be hidden. Since 2.12
a markup string (see Pango markup format) or NULL. [allow-none]
See Implementation
Sets the text of the tooltip to be markup, which is marked up with the Pango text markup language. If markup is NULL, the label will be hidden. Since 2.12