Checks to see if gtksource.gutter_lines.GutterLines.addClass was called with the name for line.
A faster version of this function is provided via gtksource.gutter_lines.GutterLines.hasQclass for situations where the quark is known ahead of time.
a line number starting from zero
a class name that may be converted, to a #GQuark
true if line contains name
Checks to see if gtksource.gutter_lines.GutterLines.addClass was called with the name for line.
A faster version of this function is provided via gtksource.gutter_lines.GutterLines.hasQclass for situations where the quark is known ahead of time.