Encodes signed and unsigned values using a common variable-length scheme, found for example in Google's Protocol Buffers.
This is a helper class which makes it easy to have pairs of values, and to use them as keys and values in Maps.
This encapsulates a Schema and allows it to be used in such a way that any aliases are ignored in equality.
This is an annotation which allows a class to signal that while it is "implementing" a method because it is specified by a parent class or interface, that the implementation just throws an exception, because it is not implemented.
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