public override Value Execute(Args args, Environment environment, SourcePos pos)
{
if (args.IsNull("date"))
{
return(ValueNull.NULL);
}
var value = args.GetDate("date");
var date = value.AsDate().GetValue();
var fmt = args.HasArg("fmt") ? args.GetString("fmt").GetValue() : "yyyy-MM-dd HH:mm:ss";
return(new ValueString(date.ToString(fmt, DateTimeFormatInfo.InvariantInfo)));
}