code: def get_storage_data(self, storage_address, offset):
          
          value = self._world_state[storage_address]['storage'].get(offset, 0)
          return simplify(value)
docs: Read a value from a storage slot on the specified account
  
          :param storage_address: an account address
          :param offset: the storage slot to use.
          :type offset: int or BitVec
          :return: the value
          :rtype: int or BitVec