def METHOD_NAME(self, request):
    batch = Batch()
    spec = request[self.array].copy()
    spec.voxel_size = self.voxel_size
    start = (request[self.array].roi.begin / self.voxel_size) + 10
    end = (request[self.array].roi.end / self.voxel_size) + 10
    data_slices = tuple(map(slice, start, end))
    data = self.data[data_slices]
    batch.arrays[self.array] = Array(data=data, spec=spec)
    return batch