https://coveralls.io/builds/8776307/source?filename=Source%2FIGListAdapter.m#L313
The underlying call to the map is tested, but we need this method covered so the public API does not regressed if changed.
@rnystrom Also may need to change return type from NSUInteger to NSInteger for swift.
I'm putting up a PR for this test right now, I'll include that!
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@rnystrom Also may need to change return type from NSUInteger to NSInteger for swift.