public static CombineAwaitable <T> CxYield <T> (T value) => ComputationExpression.Yield <T> (value);
public static TMonad CxRun <T, TMonad> (IMonadExpressionBuilder builder, Func <IMonad <T> > body)
where TMonad : IMonad <T>
{
return(ComputationExpression.Run <T, TMonad> (builder, body));
}