func registerLoadFromEmbeddedTZData(f func(string) (string, error)) {
	loadFromEmbeddedTZData = f
}

// loadFromEmbeddedTZData is used to load a specific tzdata file
// from tzdata information embedded in the binary itself.
// This is set when the time/tzdata package is imported,
// via registerLoadFromEmbeddedTzdata.
var loadFromEmbeddedTZData func(zipname string) (string, error)