code: def build_feature_collection(node, name=None):
      
      # Initialize
      geojson = {
        'type': 'FeatureCollection',
        'features': [],
      }
  
      # Build features
      for placemark in get(node, 'Placemark'):
          feature = build_feature(placemark)
          if feature is not None:
              geojson['features'].append(feature)
  
      # Give the collection a name if requested
      if name is not None:
          geojson['name'] = name
  
      return geojson
docs: Build and return a (decoded) GeoJSON FeatureCollection corresponding to this KML DOM node (typically a KML Folder).
      If a name is given, store it in the FeatureCollection's ``'name'`` attribute.