code: public final void addAnnotations(final List<SgAnnotation> annotations) {
          if (annotations == null) {
              throw new IllegalArgumentException("The argument 'annotations' cannot be NULL!");
          }
          this.annotations.addAll(annotations);
      }
docs: Adds a list of annotations. The internal list will not be cleared! The
  annotations will simply be added with <code>addAll(..)</code>.
  
  @param annotations
  Annotations to add - Cannot be null.