code: def glyphLibValidator(value):
      """
      Check the validity of the lib.
      Version 3+ (though it's backwards compatible with UFO 1 and UFO 2).
  
      >>> lib = {"foo" : "bar"}
      >>> glyphLibValidator(lib)
      (True, None)
  
      >>> lib = {"public.awesome" : "hello"}
      >>> glyphLibValidator(lib)
      (True, None)
  
      >>> lib = {"public.markColor" : "1,0,0,0.5"}
      >>> glyphLibValidator(lib)
      (True, None)
  
      >>> lib = {"public.markColor" : 1}
      >>> valid, msg = glyphLibValidator(lib)
      >>> valid
      False
      >>> print(msg)
      public.markColor is not properly formatted.
      """
      if not isDictEnough(value):
          reason = (
              "expected a dictionary, found %s" % type(value).__name__
          )
          return False, _bogusLibFormatMessage % reason
      for key, value in value.items():
          if not isinstance(key, str):
              reason = "key (%s) should be a string" % key
              return False, _bogusLibFormatMessage % reason
          # public.markColor
          if key == "public.markColor":
              if not colorValidator(value):
                  return (
                      False,
                      "public.markColor is not properly formatted.",
                  )
      return True, None
  
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 46 for calling a global function with example usage: glyphLibValidator(value) and returns: True,  None, False,  unknown, False,  unknown, False,  str