Runtime.ExecutionContextDescription

{
  "id": "ExecutionContextDescription",
  "type": "object",
  "description": "Description of an isolated world.",
  "properties": [
    {
      "name": "id",
      "$ref": "ExecutionContextId",
      "description": "Unique id of the execution context. It can be used to specify in which execution context script evaluation should be performed."
    },
    {
      "name": "origin",
      "type": "string",
      "description": "Execution context origin."
    },
    {
      "name": "name",
      "type": "string",
      "description": "Human readable name describing given context."
    },
    {
      "name": "auxData",
      "type": "object",
      "optional": true,
      "description": "Embedder-specific auxiliary data."
    }
  ]
}