/// <summary>
/// Adds a check to <see cref="Checks"/>.
/// </summary>
public ParameterBuilder AddCheck(ParameterCheckAttribute check)
{
Checks.Add(check);
return(this);
}
static async Task <(ParameterCheckAttribute Check, CheckResult Result)> RunCheckAsync(ParameterCheckAttribute check, object argument, CommandContext context)
{
var checkResult = await check.CheckAsync(argument, context).ConfigureAwait(false);
return(check, checkResult);
}