unqlite_sys::unqlite_kv_fetch_callback

pub unsafe extern fn unqlite_kv_fetch_callback(pDb: *mut unqlite, pKey: *const c_void, nKeyLen: c_int, xConsumer: Option<extern fn(arg1: *const c_void, arg2: c_uint, arg3: *mut c_void) -> c_int>, pUserData: *mut c_void) -> c_int