<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def go_stdlib(self):
 """Return the set of all Go standard library import paths. :rtype: frozenset of string """

    out = self._go_dist.create_go_cmd('list', args=['std']).check_output()
    return frozenset(out.decode('utf-8').strip().split())