{
  "version": 1,
  "nodes": [
    { "id": "src1", "typeId": "waterSource", "x": 60, "y": 140, "angle": 0,
      "props": { "title": "City main", "supply": 30 } },
    { "id": "src2", "typeId": "waterSource", "x": 60, "y": 460, "angle": 0,
      "props": { "title": "Backup well", "supply": 10 } },
    { "id": "pump1", "typeId": "pump", "x": 280, "y": 140, "angle": 0,
      "props": { "title": "Booster P-101" } },
    { "id": "power1", "typeId": "powerSupply", "x": 280, "y": 320, "angle": 0,
      "props": { "title": "MCC-1" } },
    { "id": "tee1", "typeId": "tee", "x": 520, "y": 140, "angle": 0,
      "props": { "title": "T-1" } },
    { "id": "cons1", "typeId": "consumer", "x": 800, "y": 60, "angle": 0,
      "props": { "title": "Block A", "demand": 8 } },
    { "id": "cons2", "typeId": "consumer", "x": 800, "y": 300, "angle": 0,
      "props": { "title": "Block B", "demand": 4 } }
  ],
  "edges": [
    { "id": "p1", "sourceNodeId": "src1", "sourcePortId": "out",
      "targetNodeId": "pump1", "targetPortId": "in", "relation": "water",
      "vertices": [], "props": { "title": "suction" } },
    { "id": "p2", "sourceNodeId": "pump1", "sourcePortId": "out",
      "targetNodeId": "tee1", "targetPortId": "a", "relation": "water",
      "vertices": [], "props": {} },
    { "id": "p3", "sourceNodeId": "tee1", "sourcePortId": "b",
      "targetNodeId": "cons1", "targetPortId": "waterIn", "relation": "water",
      "vertices": [], "props": {} },
    { "id": "p4", "sourceNodeId": "tee1", "sourcePortId": "c",
      "targetNodeId": "cons2", "targetPortId": "waterIn", "relation": "water",
      "vertices": [], "props": {} },
    { "id": "p5", "sourceNodeId": "src2", "sourcePortId": "out",
      "targetNodeId": "cons2", "targetPortId": "waterIn", "relation": "water",
      "vertices": [{ "x": 640, "y": 80 }], "props": { "title": "backup line" } },
    { "id": "w1", "sourceNodeId": "power1", "sourcePortId": "out",
      "targetNodeId": "pump1", "targetPortId": "powerIn", "relation": "power",
      "vertices": [], "props": { "lineStyle": "dashed", "targetMarker": "circle" } }
  ]
}