Conditional check process?

[Niels Kristian Schjødt]

I have a monit script that does something like this:

check process sidekiq_1 with pidfile /tmp/pids/sidekiq_1.pid
  start program = "/bin/bash -l -c 'bundle exec sidekiqctl start" as uid jim 
and gid jim with timeout 250 seconds
  stop program = "/bin/bash -l -c 'bundle exec sidekiqctl stop" as uid jim and 
gid jim with timeout 120 seconds
  if cpu usage > 25% for 18 cycles then restart
  if mem > 1500.0 MB for 18 cycles then restart

This is great, however I need to have the check made conditional based on the 
existence of a trigger file like so: 
        
        Only execute the check (start the process), if the file 
/tmp/do_not_start_sidekiq.txt is NOT present.

In this way i could do a "touch /tmp/do_not_start_sidekiq.txt” if I wanted to 
shut down the processes and not have monit starting them again, before I did a 
“rm /tmp/do_not_start_sidekiq.txt”

How would I do that in this monit?