code: def badEntries(self):
          
          badEntries = set()
          for i in self:
              if i.bad:
                  badEntries.add(i)
          return type(self)(badEntries, quietStart = True)
docs: Creates a new collection of the same type with only the bad entries
  
          # Returns
  
          `CollectionWithIDs`
  
          > A collection of only the bad entries