/// <summary>
/// Gets required service. Throws exception if such is not found or there are no registered services.
/// </summary>
/// <typeparam name="TInstance">Type of requested service.</typeparam>
/// <returns>Instance of TInstance type.</returns>
public static TInstance GetRequiredService <TInstance>()
{
ServiceValidator.ValidateServices();
var service = Current.GetService <TInstance>();
ServiceValidator.ValidateServiceExists(service);
return(service);
}