text.mod/graphviz.mod/graphviz/tests/regression_tests/shapes/reference/restrictionsite.gv

graph G {
	graph [bb="0,0,54,36"];
	node [label="\N"];
	a	[height=0.5,
		label="",
		pos="27,18",
		shape=restrictionsite,
		width=0.75];
}