/// <summary>
/// Used as a very light in-memory command bus returning a <see cref="CommandResult"/>.
/// Handler must implement <see cref="IHandleRequestAsync{TInput,CommandResult}"/>
/// </summary>
/// <typeparam name="TCommand"></typeparam>
/// <param name="med"></param>
/// <param name="cmd">command</param>
/// <param name="cancel">token</param>
/// <returns></returns>
public static Task <CommandResult> ExecuteAsync <TCommand>(this IMediateMessages med, TCommand cmd, CancellationToken cancel) => med.For(cmd).RequestAsync <CommandResult>(cancel);
/// <summary>
/// Used to invoke query functionality (CQRS level queries or sql query objects) which implement <see cref="IHandleQueryAsync{TInput,TOutput}"/>
/// </summary>
/// <typeparam name="TInput"></typeparam>
/// <typeparam name="TResult"></typeparam>
/// <param name="mediator"></param>
/// <param name="input">query input data</param>
/// <param name="cancel"></param>
/// <returns>query result</returns>
public static Task <TResult> QueryAsync <TInput, TResult>(this IMediateMessages mediator, TInput input, CancellationToken cancel) where TResult : class => mediator.For(input).RequestAsync <TResult>(cancel);
/// <summary>
/// Used as a very light in-memory command bus returning a <see cref="CommandResult"/>. Handler must implement <see cref="IHandleRequest{TInput,CommandResult}"/>
/// </summary>
/// <typeparam name="TCommand"></typeparam>
/// <param name="med"></param>
/// <param name="cmd">command data</param>
/// <returns></returns>
public static CommandResult Execute <TCommand>(this IMediateMessages med, TCommand cmd) => med.For(cmd).Request <CommandResult>();
/// <summary>
/// Used to invoke query functionality (CQRS level queries or sql query objects) which implement <see cref="IHandleQuery{TInput,TOutput}"/>
/// </summary>
/// <typeparam name="TInput"></typeparam>
/// <typeparam name="TResult"></typeparam>
/// <param name="mediator"></param>
/// <param name="input">query input data</param>
/// <returns>query result</returns>
public static TResult Query <TInput, TResult>(this IMediateMessages mediator, TInput input) where TResult : class => mediator.For(input).Request <TResult>();