[
  {
    "query": "percentile(measurements.fp,):3.3s",
    "result": [
      {"type": "spaces", "value": ""},
      {
        "type": "filter",
        "filter": "aggregateDuration",
        "negated": false,
        "key": {
          "type": "keyAggregate",
          "name": {"type": "keySimple", "value": "percentile", "quoted": false},
          "args": {
            "type": "keyAggregateArgs",
            "args": [
              {
                "separator": "",
                "value": {
                  "type": "keyAggregateParam",
                  "value": "measurements.fp",
                  "quoted": false
                }
              },
              {
                "separator": ",",
                "value": null
              }
            ]
          },
          "argsSpaceBefore": {"type": "spaces", "value": ""},
          "argsSpaceAfter": {"type": "spaces", "value": ""}
        },
        "operator": "",
        "value": {
          "type": "valueDuration",
          "value": "3.3",
          "unit": "s",
          "parsed": {"value": 3300}
        },
        "invalid":  {
           "reason": "Function parameters should not have empty values",
           "type": "empty-parameter-not-allowed"
         }
      },
      {"type": "spaces", "value": ""}
    ]
  }
]