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    <title>pivot-table-sk</title>
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    <h1><code>pivot-table-sk</code></h1>
    <pivot-table-sk id="good"></pivot-table-sk>

    <h1><code>pivot-table-sk</code> with invalid pivot</h1>
    <pivot-table-sk id="invalid-pivot"></pivot-table-sk>

    <h1><code>pivot-table-sk</code> with null DataFrame</h1>
    <pivot-table-sk id="null-df"></pivot-table-sk>
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