def METHOD_NAME(ccontext, cpath, thickness=1):
	"""Draw a blueish area on `ccontext`, for the selection."""
	if cpath is None:
		raise NoSelectionPathException()
	ccontext.new_path()
	ccontext.set_antialias(cairo.Antialias.NONE)
	ccontext.set_line_width(thickness)
	ccontext.set_dash([thickness * 3, thickness * 3])
	ccontext.append_path(cpath)
	ccontext.set_source_rgba(0.1, 0.1, 0.3, 0.2)
	ccontext.fill_preserve()
	ccontext.set_source_rgba(0.5, 0.5, 0.5, 0.5)
	ccontext.stroke()