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pub trait DropResult<T, E> {
    fn drop_result(self) -> core::result::Result<(), E>;
}

impl<T, E> DropResult<T, E> for core::result::Result<T, E> {
    #[inline]
    fn drop_result(self) -> core::result::Result<(), E> {
        self.map(|_| ())
    }
}