How to call help command on group prefix with no arguments?

[jacobbridges]

Serenity version: 0.8.6 Rust version (rustc -V): rustc 1.43.1

I have a command group, and when a user passes in the group prefix with no parameters, I would like the help information for the group to print.

So, if I have a group like this:

#[group]
#[prefixes("color", "cl")]
#[description = "Manage the color of your Discord username."]
#[commands(add, list, delete, set)]
struct Color;

I would like the output of !color to be the same output as doing !help color.

Any suggestions? (btw this is an awesome lib thus far :D)