`IOUtils.Java` uses `readAllBytes` which were introduced in Java 9. We should try to get rid of it so the code is compatible with Java 1.8. See https://github.com/tlaplus/CommunityModules/pull/30#pullrequestreview-563241024 for context.
IOUtils.JavausesreadAllByteswhich were introduced in Java 9. We should try to get rid of it so the code is compatible with Java 1.8.See #30 (review) for context.