public int getUserDefinedAttributesCount() {
        return internalGetUserDefinedAttributes().getMap()
                .size();
    }
<code>optional int64 mute_end_date = 6;</code>

@return The muteEndDate.
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/request/group/CreateGroupRequest.java