code: func (c *Emulation) SetCPUThrottlingRate(rate float64) (*gcdmessage.ChromeResponse, error) {
  	var v EmulationSetCPUThrottlingRateParams
  	v.Rate = rate
  	return c.SetCPUThrottlingRateWithParams(&v)
  }
docs: // SetCPUThrottlingRate - Enables CPU throttling to emulate slow CPUs.
  // rate - Throttling rate as a slowdown factor (1 is no throttle, 2 is 2x slowdown, etc).