<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def activate(self, token):
 """Make a copy of the received token and call `self._activate`."""


        if watchers.worth('MATCHER', 'DEBUG'):  # pragma: no cover
            watchers.MATCHER.debug(
                "Node <%s> activated with token %r", self, token)

        return self._activate(token.copy())