<document source="index">
    <section ids="heading" names="heading">
        <title>
            Heading
        <container classes="sd-tab-set" design_component="tab-set" is_div="True">
            <container classes="sd-tab-item" design_component="tab-item" is_div="True">
                <rubric classes="sd-tab-label" sync_group="code" sync_id="python">
                    PYTHON
                <container classes="sd-tab-content" design_component="tab-content" is_div="True">
                    <literal_block force="False" highlight_args="{'linenostart': 1}" language="python" source="snippet.py" xml:space="preserve">
                        a = 1
            <container classes="sd-tab-item" design_component="tab-item" is_div="True">
                <rubric classes="sd-tab-label" sync_group="code" sync_id="javascript">
                    JAVASCRIPT
                <container classes="sd-tab-content" design_component="tab-content" is_div="True">
                    <literal_block force="False" highlight_args="{}" language="javascript" xml:space="preserve">
                        a = 1;
