seefor.go
func (c4 *Seefor) UseTimer(timer *Timer) *Timer {
	if timer == nil {
		if c4.timer != nil {
			return c4.timer
		}
		timer = NewTimer()
	}
	c4.timer = timer

	return c4.timer
}
func (c4 *Seefor) UseTimer(timer *Timer) *Timer {
	if timer == nil {
		if c4.timer != nil {
			return c4.timer
		}
		timer = NewTimer()
	}
	c4.timer = timer

	return c4.timer
}
// UseTimer set timer for meaturing endpoint performance.
// If timer is nil and no timer exists
// then a new timer will be created 
// else existing timer will be returned.
// You can serve statistics internal using Timer as handler