Emits the “apply-tag” signal on this.
Calls [[email protected]] on the buffer’s tag table to get a `GtkTextTag`, then calls [[email protected]_tag].
| this |
a `GtkTextBuffer` |
| name |
name of a named `GtkTextTag` |
| start |
one bound of range to be tagged |
| end |
other bound of range to be tagged |