GutterLines.addQclass
void addQclass(uint line, glib.types.Quark qname)Adds the class denoted by qname to line.
You may check if a line has qname by calling [gtksource.gutter_lines.GutterLines.hasQclass].
You can remove qname by calling [gtksource.gutter_lines.GutterLines.removeQclass].
Parameters
line | a line number starting from zero |
qname | a class name as a #GQuark |