Initial upload of FreeChunk model with custom code

modeling_freechunker.py

@@ -16,7 +16,7 @@
 """FreeChunker model: Modified from PyTorch XLM-RoBERTa model."""
 from .utils import generate_shifted_matrix
 import math
-from typing import Optional, Tuple, Union
+from typing import List, Optional, Tuple, Union
 
 import torch
 import torch.utils.checkpoint