<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def _merge_page(self, existing_page, fresh_page):
        '''
        Utility method for merging info from `brozzler.Page` instances
        representing the same url but with possibly different metadata.
        '''
        existing_page.priority += fresh_page.priority
        existing_page.hashtags = list(set(
            existing_page.hashtags + fresh_page.hashtags))
        existing_page.hops_off = min(
                existing_page.hops_off, fresh_page.hops_off)