func (c *config) apply(opts []Option) {
	for _, v := range opts {
		v(c)
	}
}
// apply applies opts to c.
apply applies opts to c.
// apply applies opts to c .
func (c *config) apply(opts []Option) {
	for _, v := range opts {
		v(c)
	}
}
func ( c * config ) apply ( opts [ ] Option ) { for _ , v := range opts { v ( c ) } }
apply applies opts to c.
apply applies opts to c .