config

type Config interface {
	// For reading and writing from files
	Reader() (io.Reader, error)
	Writer() io.WriteCloser

	// Print helpers
	String() string
	Pretty() string

	// Getters/Setters
	Get(key string, val interface{}) bool
	Set(key string, val interface{})

	// IsSet is helper used to check boolean value is set
	IsSet(key string) bool
	// Exists checks whether key exists
	Exists(key string) bool
}