public void TestRead()
{
blob.store(5);
mappedBlob.read().get.getOrThrow.shouldEqual("5");
}
public Option <Try <B> > read() => backing.read().map(_ => _.map(bimap.map));
public void TestStore()
{
mappedBlob.store("3");
blob.read().get.getOrThrow.shouldEqual(3);
}