code: func (o *InstanceTypesGKE) SetPreemptible(v []string) *InstanceTypesGKE {
  	if o.Preemptible = v; o.Preemptible == nil {
  		o.nullFields = append(o.nullFields, "Preemptible")
  	}
  	return o
  }
docs: // SetPreemptible sets the list of preemptible instance types