trie

var (
	ErrEmptyLeafKey             = errors.New("the leaf node has empty key")
	ErrDifferentLeafPrefix      = errors.New("the leaf prifix path is different")
	ErrEmptyExtensionPrefix     = errors.New("the extension node has empty prefix")
	ErrDifferentExtensionPrefix = errors.New("the prifix path of extension node is different")
)