async_callback_manager/
error.rs

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pub type Result<T> = std::result::Result<T, Error>;

#[derive(Debug)]
pub enum Error {
    ReceiverDropped,
}

impl std::error::Error for Error {}
impl std::fmt::Display for Error {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Error::ReceiverDropped => write!(f, "Error sending to a channel, receiver dropped."),
        }
    }
}