@Override
  public void visitMethod(Method method) throws Exception {
    if (method instanceof FeatureMethod)
      addFeatureMetadata((FeatureMethod)method);
    if ((method instanceof FeatureMethod) || (method instanceof FixtureMethod))
      addRepeatedExtensionAnnotations(method.getAst());
  }
Puts all spec information required at runtime into annotations
attached to class members.

@author Peter Niederwieser
spock-core/src/main/java/org/spockframework/compiler/SpecAnnotator.java