title: How to polyfill a Multi-polygon in H3?
body: <p>I have a set of multipolygons in GeoJSON format, for example:</p>
  <pre><code>{ 
    &quot;type&quot;: &quot;MultiPolygon&quot;,
    &quot;coordinates&quot;: [
      [[[102.0, 2.0], [103.0, 2.0], [103.0, 3.0], [102.0, 3.0], [102.0, 2.0]]],
      [[[100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0]],
       [[100.2, 0.2], [100.8, 0.2], [100.8, 0.8], [100.2, 0.8], [100.2, 0.2]]]
    ]
  }
  </code></pre>
  <p>I'm trying to use the <code>polyfill_geojson</code> method in the H3 library to get the hexagons that fall within it. But it seems like this method only supports Polygons and not multipolygons:</p>
  <pre><code>&gt;&gt;&gt; h3.polyfill_geojson(geojson, 8)
  Traceback (most recent call last):
    File &quot;&lt;stdin&gt;&quot;, line 1, in &lt;module&gt;
    File &quot;python3.7/site-packages/h3/api/_api_template.py&quot;, line 486, in polyfill_geojson
      mv = _cy.polyfill_geojson(geojson, res)
    File &quot;geo.pyx&quot;, line 186, in h3._cy.geo.polyfill_geojson
  ValueError: Only Polygon GeoJSON supported
  </code></pre>
  <p>How can I get the H3 hexagons from a Multipolygon GeoJSON?</p>