#[doc(hidden)]
    pub fn new_adhoc<M>(message: M) -> Self

    pub(crate) fn new_adhoc<M>(message: M) -> Self

        $crate::Error::new_adhoc($msg)

        $crate::private::new_adhoc($msg)

        $crate::Error::new_adhoc(format!($fmt, $($arg)*))

        $crate::private::new_adhoc(format!($fmt, $($arg)*))

}
// Not public API.
#[doc(hidden)]
pub mod private {
    use crate::Error;
    use std::fmt::{Debug, Display};
    pub fn new_adhoc<M>(message: M) -> Error
    where
        M: Display + Debug + Send + Sync + 'static,
    {
        Error::new_adhoc(message)
    }