Explicit visibility for ProductUnit.getPowInstance (advised by Codacy)

[keilw]

See unitsofmeasurement/uom-se#180
Rest under #7

[Pr0methean]

This commit was designed purely to satisfy Codacy; feel free to suppress Codacy's warning about implicit package-local access if there's a good reason for the affected methods not to be public or protected.

[keilw]

Thanks, it is consistent with the other implementations, but here as you may have seen the static accessors were renamed to ofX() already. No strong need to do it in all other implementations, as one usually does not call them directly but via Unit.multiply() or similar. At the moment I'm hesitant to apply all the AbstractUnit changes here. Among possible goals for a new version of the JSR is unitsofmeasurement/unit-api#38 which hints that if somehow possible without incompatibilities or twists, we could make one implementation co-exist with others under the right circmumstances even in the same module or class path.

[keilw]

@Pr0methean You are more than welcome to join the JCP e.g. as Associate btw, if you consider helping Indriya and an upcoming new version of the JSR.

[Pr0methean]

Sounds great! I'll take a look at Indriya some time in the next few weeks.