code: func configValuesSet(config map[string]interface{}) map[string]interface{} {
  	flatten := make(map[string]interface{})
  	for k, v := range config {
  		if m, isMap := v.(map[string]interface{}); isMap && !flatOptions[k] {
  			for km, vm := range m {
  				flatten[km] = vm
  			}
  			continue
  		}
  
  		flatten[k] = v
  	}
  	return flatten
  }
docs: // configValuesSet returns the configuration values explicitly set in the file.