<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def copy(self):
 """Return a copy of this RequestsCookieJar."""

        new_cj = RequestsCookieJar()
        new_cj.set_policy(self.get_policy())
        new_cj.update(self)
        return new_cj