default void visitSpecAnnotations(List<T> annotations, SpecInfo spec) {
    for (T annotation : annotations) {
      visitSpecAnnotation(annotation, spec);
    }
  }
Handles the annotation when applied to a specification one or multiple times.
The default implementation of this method calls {@link #visitSpecAnnotation(Annotation, SpecInfo)}
once for each given annotation.

@since 2.0
@param annotations the annotations found on the specification
@param spec        the annotated specification
spock-core/src/main/java/org/spockframework/runtime/extension/IAnnotationDrivenExtension.java