### Question:
RefasterRule implements CodeTransformer, Serializable { @VisibleForTesting static String fromSecondLevel(String qualifiedTemplateClass) { List<String> path = Splitter.on('.').splitToList(qualifiedTemplateClass); for (int topLevel = 0; topLevel < path.size() - 1; topLevel++) { if (Ascii.isUpperCase(path.get(topLevel).charAt(0))) { return Joiner.on('_').join(path.subList(topLevel + 1, path.size())); } } return Iterables.getLast(path); } RefasterRule(); static RefasterRule<?, ?> create(
      String qualifiedTemplateClass,
      Collection<? extends Template<?>> beforeTemplates,
      Collection<? extends Template<?>> afterTemplates); static RefasterRule<?, ?> create(
      String qualifiedTemplateClass,
      Iterable<UTypeVar> typeVariables,
      Collection<? extends Template<?>> beforeTemplates,
      Collection<? extends Template<?>> afterTemplates,
      ImmutableClassToInstanceMap<Annotation> annotations); @Override abstract ImmutableClassToInstanceMap<Annotation> annotations(); @Override void apply(TreePath path, Context context, DescriptionListener listener); @Override final String toString();  }### Answer:
@Test public void fromSecondLevel() { assertThat( RefasterRule.fromSecondLevel( "com.google.devtools.javatools.refactory.refaster.cleanups.MergeNestedIf")) .isEqualTo("MergeNestedIf"); assertThat( RefasterRule.fromSecondLevel( "com.google.devtools.javatools.refactory.refaster.cleanups.HashingShortcuts.HashEntireByteArray")) .isEqualTo("HashEntireByteArray"); assertThat( RefasterRule.fromSecondLevel( "com.google.devtools.javatools.refactory.refaster.cleanups.PrimitiveComparisons.Compare.Ints")) .isEqualTo("Compare_Ints"); }