Support Result as parameter type

[B-2U]

question

I'm curious about how does the the auto converter in commands arguments work, for example:

#[poise::command(prefix_command,)]
pub async fn delmsg(
    ctx: Context<'_>,
    #[description = "Message to be deleted"] message: Option<Message>,
) -> Result<(), Error> {...}

message: Option<Message> is really impressive that can deal with both Message ID and Message Link, but I didn't find such methods in the doc

feature request

It start from a issue of the converter mentioned above, when the bot receive some unconvertable input (like inaccessible or invalid Message ID), It will directly call ctx.say to handle the error, which came from

poise::SlashArgError::Parse { error, input } => {
    poise::FrameworkError::ArgumentParse {
        ctx: ctx.into(),
        error,
        input: Some(input),
    }
}

, I tried to look into the source but I'm not good enough to understand them

So I wonder, like we can wrap type in Option to make it optional, is it possible to add such feature that wrap with Result so we can handle the potential convert error in command?