<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def search_overlap(self, point_list):
 """ Returns all intervals that overlap the point_list. """

        result = set()
        for j in point_list:
            self.search_point(j, result)
        return result