    def filter_indices_by_size(self, indices, max_sizes):
        """Filter a list of sample indices. Remove those that are longer
            than specified in max_sizes.

        Args:
            indices (np.array): original array of sample indices
            max_sizes (int or list[int] or tuple[int]): max sample size,
                can be defined separately for src and tgt (then list or tuple)

        Returns:
            np.array: filtered sample array
            list: list of removed indices
        """
        sizes = self.sizes
        tgt_sizes = sizes[:, 1] if len(sizes.shape) > 0 and sizes.shape[1] > 1 else None
        src_sizes = (
            sizes[:, 0] if len(sizes.shape) > 0 and sizes.shape[1] > 1 else sizes
        )

        return data_utils.filter_paired_dataset_indices_by_size(
            src_sizes, tgt_sizes, indices, max_sizes
        )
Filter a list of sample indices. Remove those that are longer
than specified in max_sizes.

Args:
indices (np.array): original array of sample indices
max_sizes (int or list[int] or tuple[int]): max sample size,
can be defined separately for src and tgt (then list or tuple)

Returns:
np.array: filtered sample array
list: list of removed indices
fairseq/data/multilingual/sampled_multi_dataset.py