Function hyper_error_print 

#[unsafe(no_mangle)]
pub extern "C" fn hyper_error_print(
    err: *const hyper_error,
    dst: *mut u8,
    dst_len: usize,
) -> usize

Available on crate feature ffi and hyper_unstable_ffi only.

Print the details of this error to a buffer.

The dst_len value must be the maximum length that the buffer can store.

The return value is number of bytes that were written to dst.