IIRC the appeals court ruled that the "'structure, sequence and organization' of an API was copyrightable". So even if they hadn't copied a small number of clas

IIRC the appeals court ruled that the "'structure, sequence and organization' of an API was copyrightable". So even if they hadn't copied a small number of classes¹, they'd still be liable if that decision holds. ¹ Or accidentally implemented them using the exact same code, which is quite possible given how trivial the code in question was - see rangeCheck