func (e *Endpoints) NetworkPrivateKey() []byte {
	e.mu.RLock()
	defer e.mu.RUnlock()

	return e.cert.PrivateKey()
}
func (e *Endpoints) NetworkPrivateKey() []byte {
	e.mu.RLock()
	defer e.mu.RUnlock()

	return e.cert.PrivateKey()
}
// NetworkPrivateKey returns the private key of the TLS certificate used by the
// network endpoint.