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The important thing here is that this minimal value types specification is not aimed at making Java language level changes, or many of the Java runtime changes that would be expected of other VM features such as invokeDynamic that were not exposed in the Java language. Those still require a lot of work round the Java type system and the standard library.

What this does provide is a mechanism by which the use of value types can be experimented with by library and language authors. I believe these value type features are intended to be optional and are not guaranteed to remain unchanged at future JVM releases.

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