code: public static EnumDeclaration mergeType(EnumDeclaration one, EnumDeclaration two) {
  
          if (isAllNull(one, two)) return null;
  
          EnumDeclaration ed = null;
  
          if (isAllNotNull(one, two)) {
  
              ed = new EnumDeclaration();
              ed.setJavaDoc(mergeSelective(one.getJavaDoc(), two.getJavaDoc()));
              ed.setComment(mergeSelective(one.getComment(), one.getComment()));
              ed.setModifiers(mergeModifiers(one.getModifiers(), two.getModifiers()));
              ed.setAnnotations(mergeListNoDuplicate(one.getAnnotations(), two.getAnnotations()));
              ed.setImplements(mergeListNoDuplicate(one.getImplements(), two.getImplements()));
              ed.setName(one.getName());
              ed.setEntries(mergeEnumConstants(one.getEntries(), two.getEntries()));
              LOG.info("merge EnumDeclaration --> {}", ed.getName());
  
          } else {
              ed = findFirstNotNull(one, two);
              LOG.info("add EnumDeclaration --> {}", ed.getName());
          }
  
          return ed;
      }
docs: /*
  合并枚举类型声明