BREAKPOINT ADD/REMOVE filename:line-number

Will add or remove a breakpoint at a certain file and line. The application will respond with one of:

BREAKPOINT filename:line-number ADDED

BREAKPOINT filename:line-number REMOVED

BREAKPOINT filename:line-number EXISTS

BREAKPOINT filename:line-number NOT FOUND

The last two messages are errors in trying to add a breakpoint that already exists or remove one that doesn't.

EXPR ADD expression