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```console
$ 03_04_subcommands_derive help
A simple to use, efficient, and full-featured Command Line Argument Parser
Usage: 03_04_subcommands_derive[EXE] <COMMAND>
Commands:
add Adds files to myapp
help Print this message or the help of the given subcommand(s)
Options:
-h, --help Print help
-V, --version Print version
$ 03_04_subcommands_derive help add
Adds files to myapp
Usage: 03_04_subcommands_derive[EXE] add [NAME]
Arguments:
[NAME]
Options:
-h, --help Print help
-V, --version Print version
$ 03_04_subcommands_derive add bob
'myapp add' was used, name is: Some("bob")
```
When specifying commands with `command: Commands`, they are required.
Alternatively, you could do `command: Option<Commands>` to make it optional.
```console
$ 03_04_subcommands_derive
? failed
A simple to use, efficient, and full-featured Command Line Argument Parser
Usage: 03_04_subcommands_derive[EXE] <COMMAND>
Commands:
add Adds files to myapp
help Print this message or the help of the given subcommand(s)
Options:
-h, --help Print help
-V, --version Print version
```
Since we specified [`#[command(propagate_version = true)]`][crate::Command::propagate_version],
the `--version` flag is available in all subcommands:
```console
$ 03_04_subcommands_derive --version
clap [..]
$ 03_04_subcommands_derive add --version
clap-add [..]
```
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