package api func getOpts(opt ...Option) options { opts := getDefaultOptions() for _, o := range opt { o(&opts) } return opts } // Option - how Options are passed as arguments type Option func(*options) // options = how options are represented type options struct { withScopeId string } func getDefaultOptions() options { return options{ withScopeId: "", } } func WithScopeId(id string) Option { return func(o *options) { o.withScopeId = id } }