errors.rs
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pub type Result<T> = ::std::result::Result<T, Error>;
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct Error;
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
write!(f, "Error")
}
}
impl std::error::Error for Error {}