code: def get_next_objective_banks(self, n=None):
          
          if n > self.available():
              # !!! This is not quite as specified (see method docs) !!!
              raise IllegalState('not enough elements available in this list')
          else:
              next_list = []
              x = 0
              while x < n:
                  try:
                      next_list.append(next(self))
                  except Exception:  # Need to specify exceptions here!
                      raise OperationFailed()
                  x = x + 1
              return next_list
docs: Gets the next set of ObjectiveBank elements in this list which
          must be less than or equal to the return from available().
  
          arg:    n (cardinal): the number of ObjectiveBank elements
                  requested which must be less than or equal to
                  available()
          return: (osid.learning.ObjectiveBank) - an array of
                  ObjectiveBank elements.  The length of the array is less
                  than or equal to the number specified.
          raise:  IllegalState - no more elements available in this list
          raise:  OperationFailed - unable to complete request
          compliance: mandatory - This method must be implemented.