`NullPointerException` (NPE) in `NestedEnumsAreNotStatic`

What version of OpenRewrite are you using?

8.67.1

How are you running OpenRewrite?

Moderne CLI

What is the smallest, simplest way to reproduce the problem?

mod run . --recipe CommonStaticAnalysis against https://github.com/awslabs/aws-saas-boost

What is the full stack trace of any errors you encountered?

"java.lang.NullPointerException: Cannot invoke "org.openrewrite.java.tree.J$Block.getPrefix()" because the return value of "org.openrewrite.java.tree.J$ClassDeclaration.getBody()" is null
  org.openrewrite.java.format.SpacesVisitor.visitClassDeclaration(SpacesVisitor.java:722)
  org.openrewrite.java.format.SpacesVisitor.visitClassDeclaration(SpacesVisitor.java:42)
  org.openrewrite.java.tree.J$ClassDeclaration.acceptJava(J.java:1370)
  org.openrewrite.java.tree.J.accept(J.java:55)
  org.openrewrite.TreeVisitor.visit(TreeVisitor.java:242)
  org.openrewrite.java.format.SpacesVisitor.visit(SpacesVisitor.java:741)
  org.openrewrite.java.format.SpacesVisitor.visit(SpacesVisitor.java:42)
  org.openrewrite.TreeVisitor.visit(TreeVisitor.java:154)
  org.openrewrite.TreeVisitor.visitNonNull(TreeVisitor.java:173)
  org.openrewrite.java.format.AutoFormatVisitor.visit(AutoFormatVisitor.java:74)
  org.openrewrite.java.format.AutoFormatVisitor.visit(AutoFormatVisitor.java:34)
  org.openrewrite.java.JavaVisitor.autoFormat(JavaVisitor.java:95)
  org.openrewrite.java.JavaVisitor.maybeAutoFormat(JavaVisitor.java:76)
  org.openrewrite.java.JavaVisitor.maybeAutoFormat(JavaVisitor.java:71)
  org.openrewrite.java.JavaVisitor.maybeAutoFormat(JavaVisitor.java:67)
  org.openrewrite.staticanalysis.NestedEnumsAreNotStatic$1.visitClassDeclaration(NestedEnumsAreNotStatic.java:66)
  ..."

for https://github.com/awslabs/aws-saas-boost/blob/452d7ca8902e7338e999290eebad9062c342915f/metrics-analytics/metrics-java-sdk/src/main/java/com/amazonaws/saas/metrics/MetricEvent.java

Reproduce the failure with the Moderne CLI command against the linked aws-saas-boost revision, then inspect MetricEvent.java and NestedEnumsAreNotStatic.java. Follow the stack trace through SpacesVisitor.visitClassDeclaration and AutoFormatVisitor to determine why the class body is null. Done means CommonStaticAnalysis no longer raises this NullPointerException on the reproduction.