c3p0_common 0.72.3

A good friend for r2d2
Documentation 
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/// An enum to represent the order by of a query.
#[derive(Clone, Debug, PartialEq)]
pub enum OrderBy {
    Asc,
    Desc,
    Default,
}

impl OrderBy {
    pub fn to_sql(&self) -> &str {
        match self {
            OrderBy::Asc => "asc",
            OrderBy::Desc => "desc",
            OrderBy::Default => "",
        }
    }
}