Scheduler Global Limit

I currently have the following basic shiny-server.conf setup

 location / {

    simple_scheduler 10;

    site_dir /srv/shiny-server;

    log_dir /var/log/shiny-server;

    directory_index on;

    location /some-app {
      simple_scheduler 5;
    }
  }

This allows me to have 10 instances of any app whilst an additional 5 instances of some-app specifically. Is there any way to make it so that there is a global limit? For example if 10 locations have a limit of 5 but the overall limit is 15 regardless of which app they come from?