Function sled_get 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn sled_get(
    db: *mut Db,
    key: *const c_char,
    keylen: size_t,
    vallen: *mut size_t,
) -> *mut c_char

Get the value of a key. Caller is responsible for freeing the returned value with sled_free_buf if it’s non-null.