blosc2_new_schunk(blosc2_cparams cparams, blosc2_dparams dparams, IntPtr frame);
public static extern int blosc2_update_usermeta(IntPtr schunk, IntPtr content, int content_len, blosc2_cparams cparams);
public static extern IntPtr blosc2_create_cctx(blosc2_cparams cparams);