biscuit 0.5.0-beta2

A library to work with Javascript Object Signing and Encryption(JOSE), including JSON Web Tokens (JWT), JSON Web Signature (JWS) and JSON Web Encryption (JWE).
Documentation 
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#[derive(Clone, Copy, Debug, Eq, PartialEq)]
/// Defines whether a claim is required or not
pub enum Presence {
    /// Claim is optional
    Optional,
    /// Claim is required
    Required,
}

impl Default for Presence {
    fn default() -> Self {
        Presence::Optional
    }
}