Can Any body Tell me
how this package https://github.com/fastai/course-v3/tree/master/nbs/swift/FastaiNotebook_01_matmul
is being used in this notebook
https://github.com/fastai/course-v3/tree/master/nbs/swift/FastaiNotebook_01a_fastai_layers.
One cell of this notebook throws error if matmul is not import.