public com.google.protobuf.ByteString
            getWxIdBytes() {
                Object ref = wxId_;
                if (ref instanceof String) {
                    com.google.protobuf.ByteString b =
                            com.google.protobuf.ByteString.copyFromUtf8(
                                    (String) ref);
                    wxId_ = b;
                    return b;
                } else {
                    return (com.google.protobuf.ByteString) ref;
                }
            }
<code>string wxId = 1;</code>

@return The bytes for wxId.
wx-dump-admin/src/main/java/com/xcs/wx/protobuf/ChatRoomProto.java