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{
  "type": "object",
  "properties": {
    "selectors": {
      "type": "array",
      "description": "The elements to measure, as CSS selectors, e.g. [\"#checkout button[type=submit]\", \".modal-overlay\"]. Pass every element you want compared in one call: overlaps are only computed between elements in the same array.",
      "items": {
        "type": "string",
        "description": "One CSS selector. Use find_element first to get selectors that stay valid across the recording."
      }
    },
    "timestamp": {
      "type": "number",
      "description": "The moment to measure, in ms from the start of the recording. Example: 28412. Geometry changes as the page reflows, so this is not optional."
    }
  },
  "required": [
    "selectors",
    "timestamp"
  ],
  "additionalProperties": false
}