clap 3.0.0-beta.3

A simple to use, efficient, and full-featured Command Line Argument Parser
Documentation 
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#[derive(Debug, Copy, Clone, PartialEq)]
pub(crate) enum ColorChoice {
    Auto,
    Always,
    Never,
}

#[derive(Debug)]
pub(crate) enum Color {
    Green,
    Yellow,
    Red,
}