/proc/4/root/proc
This explorer reads the filesystem of the server it runs on, so /workspace/user isn't present here. Browsing and the terminal still work against this server's own disk from /.
#subsys_name hierarchy num_cgroups enabledcpuset 7 1 1cpu 4 61 1cpuacct 4 61 1blkio 9 58 1memory 5 77 1devices 3 58 1freezer 10 4 1net_cls 6 1 1perf_event 2 1 1net_prio 6 1 1hugetlb 8 1 1pids 11 58 1