[MSHADE-481] Can we mark members in SimpleRelocator protected?

**[Zongle Wang](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=JIRAUSER294797)** opened **[MSHADE-481](https://issues.apache.org/jira/browse/MSHADE-481?redirect=false)** and commented

I'm refactoring [Shadow Gradle Plugin](https://github.com/GradleUp/shadow), which implements Maven Shade Plugin on Gradle.
The logic in [SimpleRelocator.kt](https://github.com/GradleUp/shadow/blob/main/src/main/kotlin/com/github/jengelman/gradle/plugins/shadow/relocation/SimpleRelocator.kt) is simular to [SimpleRelocator.java](https://github.com/apache/maven-shade-plugin/blob/f15f26b1b8100d0c3bfa15b9e8b233922432ee15/src/main/java/org/apache/maven/plugins/shade/relocation/SimpleRelocator.java) but behind some features and bug fixes. It would be great if we can mark some members `protected` in `SimpleRelocator.java`, this is handy for delegating logic of `SimpleRelocator.java` to `SimpleRelocator.kt`. This change would also make it easier to keep the Kotlin implementation in sync with updates from the Maven Shade Plugin side.

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No further details from [MSHADE-481](https://issues.apache.org/jira/browse/MSHADE-481?redirect=false)

Read src/main/java/org/apache/maven/plugins/shade/relocation/SimpleRelocator.java and compare it with the linked SimpleRelocator.kt implementation. Identify which members need protected visibility for delegation, then verify that the requested visibility changes support the Kotlin implementation without changing behavior.

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