Batch size in seq2seqdatabunch

Hi All,
def create(cls, train_ds, valid_ds, test_ds=None, path:PathOrStr=’.’, bs:int=32, val_bs:int=None, pad_idx=1,pad_first=False, device:torch.device=None, no_check:bool=False, backwards:bool=False, **dl_kwargs) -> DataBunch:

the above function definition has batch size value assigned to 32 ,but when i was trying to analyse the code i observe that the batch size remains fixed at 64.It would be really helpful if any of you can shed some light.