docs: function readRawFeature(pbf, layer, i) {
    pbf.pos = layer.features[i];
    const end = pbf.readVarint() + pbf.pos;
  
    const feature = {
      layer: layer,
      type: 0,
      properties: {}
    };
    pbf.readFields(featurePBFReader, feature, end);
    return feature;
  }