code: public static ClassOrInterfaceDeclaration mergeType(ClassOrInterfaceDeclaration one, ClassOrInterfaceDeclaration two) {
          if (isAllNull(one, two)) return null;
  
          ClassOrInterfaceDeclaration coid = null;
  
          if (isAllNotNull(one, two)) {
  
              coid = new ClassOrInterfaceDeclaration();
              coid.setName(one.getName());
              coid.setJavaDoc(mergeSelective(one.getJavaDoc(), two.getJavaDoc()));
              coid.setComment(mergeSelective(one.getComment(), two.getComment()));
              coid.setAnnotations(mergeListNoDuplicate(one.getAnnotations(), two.getAnnotations()));
              coid.setModifiers(mergeModifiers(one.getModifiers(), two.getModifiers()));
              coid.setExtends(mergeListNoDuplicate(one.getExtends(), two.getExtends()));
              coid.setImplements(mergeListNoDuplicate(one.getImplements(), two.getImplements()));
              coid.setTypeParameters(mergeSelective(one.getTypeParameters(), two.getTypeParameters()));
              coid.setInterface(one.isInterface());
              coid.setMembers(mergeBodies(one.getMembers(), two.getMembers()));
  
              LOG.info("merge ClassOrInterfaceDeclaration --> {}", coid.getName());
  
          } else {
              coid = findFirstNotNull(one, two);
              LOG.info("add ClassOrInterfaceDeclaration --> {}", coid.getName());
          }
          return coid;
      }
docs: /*
  合并类或接口类型声明