Devel::Chitin is not a usable debugger per se. It has no mechanism for
interacting with a user such as reading command input or printing results.
Instead, clients of this API may call methods to inspect the debugged
program state. The debugger core calls methods on clients when certain
events occur, such as when the program is stopped by breakpoint or when the
program exits. Multiple clients can attach themselves to Devel::Chitin
simultaneously within the same debugged program.