PowerMock MemberModifier support

[ChenyuWang98]

What problem are you trying to solve?

MemberModifier method cannot be recognized and implemented in mockito.

Describe the solution you'd like

https://docs.openrewrite.org/recipes/java/testing/mockito/replacepowermockito
MemberModifier.field(WebLicenseManager.class, "coreLics").set(webLicenseManager, coreLics);

Have you considered any alternatives or workarounds?

Private method → package-level visibility + @VisibleForTesting

Additional context

Are you interested in contributing this feature to OpenRewrite?

[timtebeek]

Thanks for the report! I've added this to the backlog for now; you're welcome to help pick this up if that helps you there!