external

type External interface {
	// TagName is key name in golang struct tag (json, yaml, toml etc.).
	TagName() []string
	// Unmarshal parses the external data and stores the result
	// in the value pointed to by v.
	// Usually, it just wraps the existing `Unmarshal` function of third-party libraries
	Unmarshal(v interface{}) error
}

type ExternalConfigMapper struct {
	// contains filtered or unexported fields
}

type ExternalSource interface {
	Read(string) (interface{}, bool)
}

type NilContainer struct{}