Method fmt

crates/stdlib/src/contextvars.rs:306–308

(&self, f: &mut core::fmt::Formatter<'_>)

    impl core::fmt::Debug for ContextVar {
        fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
            f.debug_struct("ContextVar").finish()
        }
    }

    unsafe impl Sync for ContextVar {}