code: def __init__(self, *features):
      super().__init__("feature-list", name=None)
      self.__elements = list(features)
  
imports: import io
  import json
  import os
  from typing import Union
  from lets_plot._global_settings import get_global_bool, has_global_value, FRAGMENTS_ENABLED
label_desc: Use image node_id 1 to create a new FeatureSpecArray object from inherited base classes: FeatureSpec with example: obj = FeatureSpecArray()