code: public static AnnotationDeclaration mergeType(AnnotationDeclaration one, AnnotationDeclaration two) {
  
          if (isAllNull(one, two)) return null;
  
          AnnotationDeclaration annotationDeclaration = null;
  
          if (isAllNotNull(one, two)) {
  
              annotationDeclaration = new AnnotationDeclaration();
  
              annotationDeclaration.setModifiers(
                      mergeModifiers(one.getModifiers(), two.getModifiers()));
  
              annotationDeclaration.setJavaDoc(
                      (JavadocComment) mergeSelective(one.getJavaDoc(), two.getJavaDoc()));
  
              annotationDeclaration.setComment(mergeSelective(one.getComment(), two.getComment()));
  
              annotationDeclaration.setAnnotations(
                      mergeListNoDuplicate(one.getAnnotations(), two.getAnnotations()));
  
              // merge content body
              annotationDeclaration.setMembers(mergeBodies(one.getMembers(), two.getMembers()));
  
              LOG.info("merge AnnotationDeclaration --> {}", annotationDeclaration.getName());
  
          } else {
              annotationDeclaration = findFirstNotNull(one, two);
              LOG.info("add AnnotationDeclaration --> {}", annotationDeclaration.getName());
          }
  
          return annotationDeclaration;
      }
docs: /*
  合并注解声明