<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def failed_extra_capabilities(self):
 """Check to see if instance passes its `extra_capability_checks`."""

        failed = []
        for capability, f_name in self.extra_capability_checks.items():
            f = getattr(self, f_name)
            instance_capable = f()
            if not instance_capable:
                failed.append(capability)
        return failed