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#[derive(Debug)]
pub enum EvaluationError {
    Failed,
}

pub type EvaluationResult<T> = Result<T, EvaluationError>;

#[derive(Debug)]
pub enum UpdateError {
    Failed,
}

pub type UpdateResult<T> = Result<T, UpdateError>;

#[derive(Debug)]
pub enum AdaptError {
    Failed,
    NotImplemented,
}

pub type AdaptResult<T> = Result<T, AdaptError>;