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use thiserror::Error; #[derive(Error, Debug)] pub enum ConvertError { #[error("Conversion not supported {0} to {1}")] NotSupported(String, String), } #[derive(Error, Debug)] pub enum DaoError { #[error("ConvertError {0}")] ConvertError(ConvertError), #[error("No such value {0}")] NoSuchValueError(String), }