[HotFix] NoGuavaJava21 causing invalid code since v2.28.0

[BramliAK]

What's changed?

Rollback visit Variable Declarations

Checklist

• I've added unit tests to cover both positive and negative cases
• I've read and applied the recipe conventions and best practices
• I've used the IntelliJ IDEA auto-formatter on affected files

[github-actions]

Some suggestions could not be made:

• src/main/java/org/openrewrite/java/migrate/guava/AbstractNoGuavaImmutableOf.java
  • lines 19-19

[timtebeek]

hi @BramliAK ; Understand that you'd like this fixed; Instead of completely removing this, can we make this opt-in with an @Option instead? That way the nice addition you added in #590 isn't completely lost, and it opens the door to an alternative composite recipe that does potentially unsafe replacements.

[github-actions]

Suggested change

	import java.time.Duration;
	import org.jspecify.annotations.Nullable;
	import org.jspecify.annotations.Nullable;

[github-actions]

Suggested change

	import java.util.ArrayList;
	import java.util.List;
	import java.time.Duration;
	import java.util.List;