{
"layers": [
	[
		{"name": "n1","width":40,"height":40},
		{"name":"n2","width":40,"height":40}
	],
	[
		{"name":"n3","width":40,"height":40},
		{"name":"n4","width":40,"height":40},
		{"name":"n0","width":40,"height":40}
	]
],
"edges":[
	{"source":"n1","target":"n0"},
	{"source":"n2","target":"n0"}
],
"name":"n0"
}