datasources 0.1.5

Async datasource interfaces, middleware, registry, and test doubles
Documentation 
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#[derive(Debug, Clone, PartialEq, Eq)]
pub struct NotNull {
    pub name: Option<String>,
}

impl NotNull {
    pub fn new(name: Option<&str>) -> Self {
        Self {
            name: name.map(str::to_string),
        }
    }
}