code: def merge_featurecollection(*jsons):
      
      features = []
      for json in jsons:
          if json['type'] == 'FeatureCollection':
              for feature in json['features']:
                  features.append(feature)
      return {"type":'FeatureCollection', "features":features}
docs: merge features into one featurecollection
  
      Keyword arguments:
      jsons   -- jsons object list 
  
      return geojson featurecollection