{
    "id": "root",
    "layoutOptions": {
        "algorithm": "layered",
        "elk.direction": "DOWN",
        "nodePlacement.strategy": "LINEAR_SEGMENTS"
    },
    "children": [
        {
            "id": "P1",
            "width": 100,
            "height": 50,
            "ports": [
                {"id": "P1:n", "layoutOptions": {"side": "NORTH"}},
                {"id": "P1:s", "layoutOptions": {"side": "SOUTH"}}
            ],
            "labels": [{
                "text": "P1"
            }]
        },
        {
            "id": "P2",
            "width": 100,
            "height": 50,
            "ports": [
                {"id": "P2:n", "layoutOptions": {"side": "NORTH"}},
                {"id": "P2:s", "layoutOptions": {"side": "SOUTH"}}
            ],
            "labels": [{
                "text": "P2"
            }]
        },
        {
            "id": "P3",
            "width": 100,
            "height": 50,
            "ports": [
                {"id": "P3:n", "layoutOptions": {"side": "NORTH"}}
            ],
            "labels": [{
                "text": "P3"
            }]
        },
        {
            "id": "P4",
            "width": 100,
            "height": 50,
            "ports": [
                {"id": "P4:n", "layoutOptions": {"side": "NORTH"}}
            ],
            "labels": [{
                "text": "P4"
            }]
        },
        {
            "id": "P5",
            "width": 100,
            "height": 50,
            "ports": [
                {"id": "P5:n", "layoutOptions": {"side": "NORTH"}}
            ],
            "labels": [{
                "text": "P5"
            }]
        },
        {
            "id": "R1",
            "width": 0,
            "height": 0,
            "ports": [
                {"id": "R1:n", "layoutOptions": {"side": "NORTH"}},
                {"id": "R1:s", "layoutOptions": {"side": "SOUTH"}}
            ]
        }
    ],
    "edges": [
        {"id": "E1", "sources": [ "P1:s" ], "targets": [ "R1:n" ] },
        {"id": "E2", "sources": [ "P2:s" ], "targets": [ "R1:n" ] },
        {"id": "E3", "sources": [ "R1:s" ], "targets": [ "P3:n" ] },
        {"id": "E4", "sources": [ "R1:s" ], "targets": [ "P4:n" ] },
        {"id": "E5", "sources": [ "R1:s" ], "targets": [ "P5:n" ] }
    ]
}