{
  "name": "Custom ServiceTask",
  "id": "my.custom.ServiceTask",
  "appliesTo": [
    "bpmn:ServiceTask"
  ],
  "properties": [
    {
      "label": "STUFF TO CALL",
      "type": "Hidden",
      "editable": false,
      "value": "com.my.custom.Foo",
      "binding": {
        "type": "property",
        "name": "camunda:delegateExpression"
      }
    }
  ]
}