You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: structs.go
    path of file: ./repos/koanf/providers/structs
    
    the code of the file until where you have to start completion: // Package structs implements a koanf.Provider that takes a struct and tag
// and returns a nested config map (using fatih/structs) to provide it to koanf.
package structs

import
    
func (s *Structs) Read() (map[string]interface{}, error) {
	ns := structs.New(s.s)
	ns.TagName = s.tag

	out := ns.Map()

	if s.delim != "" {
		out = maps.Unflatten(out, s.delim)
	}

	return out, nil
}