CSS.createStyleSheet

{
  "name": "createStyleSheet",
  "parameters": [
    {
      "name": "frameId",
      "$ref": "Network.FrameId",
      "description": "Identifier of the frame where the new \"inspector\" stylesheet should be created."
    }
  ],
  "returns": [
    {
      "name": "styleSheetId",
      "$ref": "StyleSheetId",
      "description": "Identifier of the created \"inspector\" stylesheet."
    }
  ],
  "description": "Creates a new special \"inspector\" stylesheet in the frame with given frameId."
}