pub unsafe extern "C" fn BNPerformCustomRequest(
instance: *mut BNDownloadInstance,
method: *const c_char,
url: *const c_char,
headerCount: u64,
headerKeys: *const *const c_char,
headerValues: *const *const c_char,
response: *mut *mut BNDownloadInstanceResponse,
callbacks: *mut BNDownloadInstanceInputOutputCallbacks,
) -> c_int