Can `cap_fs_ext::OpenOptions` support for dsync, sync, nonblock, rsync flags?

[pchickey]

I can use system_interface::GetSetFdFlags::set_fd_flags on a file to set FdFlags::{DSYNC, SYNC, NONBLOCK, RSYNC} after opening it. Can OpenOptions support these as well?

[pchickey]

note to self: I can clean up cap_std_sync::Dir::open_file to not call set_fd_flags if this becomes possible.