public Builder mergeFrom(org.anychat.protobuf.ws.LoginChatProto.LoginChatServerS other) {
        if (other == org.anychat.protobuf.ws.LoginChatProto.LoginChatServerS.getDefaultInstance()) return this;
        if (!other.getWsOpCode().isEmpty()) {
          wsOpCode_ = other.wsOpCode_;
          onChanged();
        }
        if (other.hasChatUser()) {
          mergeChatUser(other.getChatUser());
        }
        if (chatUserListBuilder_ == null) {
          if (!other.chatUserList_.isEmpty()) {
            if (chatUserList_.isEmpty()) {
              chatUserList_ = other.chatUserList_;
              bitField0_ = (bitField0_ & ~0x00000004);
            } else {
              ensureChatUserListIsMutable();
              chatUserList_.addAll(other.chatUserList_);
            }
            onChanged();
          }
        } else {
          if (!other.chatUserList_.isEmpty()) {
            if (chatUserListBuilder_.isEmpty()) {
              chatUserListBuilder_.dispose();
              chatUserListBuilder_ = null;
              chatUserList_ = other.chatUserList_;
              bitField0_ = (bitField0_ & ~0x00000004);
              chatUserListBuilder_ = 
                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders ?
                   getChatUserListFieldBuilder() : null;
            } else {
              chatUserListBuilder_.addAllMessages(other.chatUserList_);
            }
          }
        }
        if (chatGroupListBuilder_ == null) {
          if (!other.chatGroupList_.isEmpty()) {
            if (chatGroupList_.isEmpty()) {
              chatGroupList_ = other.chatGroupList_;
              bitField0_ = (bitField0_ & ~0x00000008);
            } else {
              ensureChatGroupListIsMutable();
              chatGroupList_.addAll(other.chatGroupList_);
            }
            onChanged();
          }
        } else {
          if (!other.chatGroupList_.isEmpty()) {
            if (chatGroupListBuilder_.isEmpty()) {
              chatGroupListBuilder_.dispose();
              chatGroupListBuilder_ = null;
              chatGroupList_ = other.chatGroupList_;
              bitField0_ = (bitField0_ & ~0x00000008);
              chatGroupListBuilder_ = 
                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders ?
                   getChatGroupListFieldBuilder() : null;
            } else {
              chatGroupListBuilder_.addAllMessages(other.chatGroupList_);
            }
          }
        }
        onChanged();
        return this;
      }
Protobuf type {@code org.anychat.protobuf.ws.LoginChatServerS}
AnyChatServer/src/main/java/org/anychat/protobuf/ws/LoginChatProto.java