code: def imageValidator(value):
      """
      Version 3+.
      """
      if not genericDictValidator(value, _imageDictPrototype):
          return False
      # fileName must be one or more characters
      if not value["fileName"]:
          return False
      # color must follow the proper format
      color = value.get("color")
      if color is not None and not colorValidator(color):
          return False
      return True
  
imports: import calendar
  from io import open
  import fs.base
  import fs.osfs
  from collections.abc import Mapping
  from fontTools.ufoLib.utils import numberTypes
label_desc: Use image node_id 40 for calling a global function with example usage: imageValidator(value) and returns: True, False, False, False