Function with_basic_file

block/src/qcow/mod.rs:2430–2435

(header: &[u8], mut testfn: F)

    }

    fn with_basic_file<F>(header: &[u8], mut testfn: F)
    where
        F: FnMut(RawFile),
    {
        testfn(basic_file(header)); // File closed when the function exits.
    }

    fn with_default_file<F>(file_size: u64, direct: bool, mut testfn: F)
    where