An object used to change the display properties of a block of text in a GtkTextBuffer.
A tag is applied across a range of text identified by two GtkTextIters and affects the way that range of text is displayed. For example, a tag may define the font-weight, color, text size or any combination of many different properties for the range of text.
event() Emits the event signal on the tag. get_priority() Returns the tag's priority in relation to other tags in its GtkTextTagTable. set_priority() Sets the priority of the tag in relation to the other tags in its GtkTextTagTable. "event"