'add before/after tracing functions for all hooks
and return an undo function which, when called,
will remove the added tracers.
``before(hook_name, hook_impls, kwargs)`` will be called ahead
of all hook calls and receive a hookcaller instance, a list
of HookImpl instances and the keyword arguments for the hook call.
``after(outcome, hook_name, hook_impls, kwargs)`` receives the
same arguments as ``before`` but also a :py:class:`_CallOutcome <_pytest.vendored_packages.pluggy._CallOutcome>` object
which represents the result of the overall hook call.'

def add_hookcall_monitoring(self, before, after):

    return _TracedHookExecution(self, before, after).undo
