Adds the class @name to @line.
@name will be converted to a [alias@GLib.Quark] as part of this process. A faster version of this function is available via [method@GutterLines.add_qclass] for situations where the [alias@GLib.Quark] is known ahead of time.
a line number starting from zero
a class name
See Implementation
Adds the class @name to @line.
@name will be converted to a [alias@GLib.Quark] as part of this process. A faster version of this function is available via [method@GutterLines.add_qclass] for situations where the [alias@GLib.Quark] is known ahead of time.