environment

type Table interface {
	Mode() safe.Mode

	Names() []string

	SetEnv(name, value string)

	GetEnv(name string) string
	GetEnvOptional(name, defaultValue string) string
	GetEnvRequired(name string) (string, error)

	Export(dst map[string]string) map[string]string
	Import(src map[string]string)
}