code: def get_hash_table_entry(self, filename):
          
          hash_a = self._hash(filename, 'HASH_A')
          hash_b = self._hash(filename, 'HASH_B')
          for entry in self.hash_table:
              if (entry.hash_a == hash_a and entry.hash_b == hash_b):
                  return entry
docs: Get the hash table entry corresponding to a given filename.