Hi, looking for some insights regarding Sum256, especially line 139. https://golang.org/src/crypto/sha256/sha256.go?#L139 Doesn't the statement `len := d.len` shadow the len() function and isn't that supposed to be "bad style" or am I missing something here? If it is shadowing, is this OK to do for specific cases or shall I avoid this in my own code in general?
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