code: func StripPrefix(strip bool) source.Option {
  	return func(o *source.Options) {
  		if o.Context == nil {
  			o.Context = context.Background()
  		}
  
  		o.Context = context.WithValue(o.Context, stripPrefixKey{}, strip)
  	}
  }
docs: // StripPrefix indicates whether to remove the prefix from config entries, or leave it in place.