code: func (c *Overlay) SetInspectModeWithParams(v *OverlaySetInspectModeParams) (*gcdmessage.ChromeResponse, error) {
  	return gcdmessage.SendDefaultRequest(c.target, c.target.GetSendCh(), &gcdmessage.ParamRequest{Id: c.target.GetId(), Method: "Overlay.setInspectMode", Params: v})
  }
docs: // SetInspectModeWithParams - Enters the 'inspect' mode. In this mode, elements that user is hovering over are highlighted. Backend then generates 'inspectNodeRequested' event upon element selection.