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use ref_cast::{ref_cast_custom, RefCastCustom};
#[derive(RefCastCustom)]
#[repr(transparent)]
pub struct Thing(str);
impl Thing {
#[ref_cast_custom]
pub fn ref_cast(s: impl AsRef<str>) -> &Self;
#[ref_cast_custom]
pub fn ref_cast2(s: &impl AsRef<str>) -> &Self;
}
fn main() {}