class PaloSerializer extends MysqlSerializer {

    public PaloSerializer(HugeConfig config) {
        super(config);
    }

    @Override
    protected void writeEnableLabelIndex(SchemaLabel schema,
                                         TableBackendEntry entry) {<FILL_FUNCTION_BODY>}

    @Override
    protected void readEnableLabelIndex(SchemaLabel schema,
                                        TableBackendEntry entry) {
        Number enable = entry.column(HugeKeys.ENABLE_LABEL_INDEX);
        schema.enableLabelIndex(enable.byteValue() != 0);
    }
}

        Byte enable = (byte) (schema.enableLabelIndex() ? 1 : 0);
        entry.column(HugeKeys.ENABLE_LABEL_INDEX, enable);
    
<methods>public void <init>(HugeConfig) ,public org.apache.hugegraph.backend.store.mysql.MysqlBackendEntry newBackendEntry(org.apache.hugegraph.type.HugeType, org.apache.hugegraph.backend.id.Id) ,public org.apache.hugegraph.backend.store.BackendEntry writeOlapVertex(org.apache.hugegraph.structure.HugeVertex) <variables>