text: 
  
  class CollectionModel:
  
      def __init__(self, database_id=None, source_id=None, data_version=None, sample=None):
          self.database_id = database_id
          self.source_id = source_id
          self.data_version = data_version
          self.sample = sample
  
  
  class FileModel:
  
      def __init__(self, database_id=None, filename=None):
          self.database_id = database_id
          self.filename = filename
  