assert mode == DUAL_SYNC || mode == DUAL_ASYNC; await(path);
assert mode == DUAL_SYNC || mode == DUAL_ASYNC; await(path);
assert secondaryFs != null; await(path);
assert secondaryFs != null; await(path);
assert mode == DUAL_SYNC || mode == DUAL_ASYNC; await(path);
assert mode == DUAL_SYNC || mode == DUAL_ASYNC; await(path);
assert mode == DUAL_SYNC || mode == DUAL_ASYNC; await(path);
assert mode == DUAL_SYNC || mode == DUAL_ASYNC; await(path);
assert mode == DUAL_SYNC || mode == DUAL_ASYNC; await(path);
assert mode == DUAL_SYNC || mode == DUAL_ASYNC; await(path);
assert mode == DUAL_SYNC || mode == DUAL_ASYNC; await(src, dest);
assert mode == DUAL_SYNC || mode == DUAL_ASYNC; await(src, dest);