Helper function which implements multi index requests for __getitem__.

def _get_slice_request_data(self, index):
        '''
        Helper function which implements multi index requests for __getitem__.
        '''
        # Do a check on list indices for early error detection
        if not is_slice_or_dim_range(index):
            single_depth = self._get_single_depth(index)
            # Single value indices for first single_depth values
            if single_depth > 0:
                # We have integer request first
                subindicies = index[:single_depth]
                sublist = self
                # Use the other side of __getitem__ to grab subindices
                for sind in subindicies:
                    sublist = sublist[sind]
                # If we still have some index requests left or dimension
                # restrictions, then return a FixedListSubset
                if single_depth < len(index) or isinstance(sublist, FixedListSubset):
                    new_dim_ranges = self._combine_dimension_lists(self._dim_ranges, index)
                    return self.builder(sublist, *new_dim_ranges[single_depth:])
                # Otherwise our sublist is actually an element of the
                # original data, so just return it
                else:
                    return sublist
        new_dim_ranges = self._combine_dimension_lists(self._dim_ranges, index)
        return self.builder(self._data, *new_dim_ranges)