## assert-key-contains Service ExecStart " --label org.foo.Arg1=arg1 "
## assert-key-contains Service ExecStart " --label org.foo.Arg2=arg2 "
## assert-key-contains Service ExecStart " --label org.foo.Arg3=arg3 "

[Volume]
Label=org.foo.Arg1=arg1
Label=org.foo.Arg2=arg2 \
   org.foo.Arg3=arg3