code: def required(validator, required, instance, schema):
      if not validator.is_type(instance, "object"):
          return
      for property in required:
          if property not in instance:
              yield ValidationError(
                  "%r is a required property" % property
              )
  
imports: import re
  from jsonschema._utils import ensure_list, equal, extras_msg, find_additional_properties, types_msg, unbool, uniq
  from jsonschema.exceptions import FormatError, ValidationError
  from jsonschema.compat import iteritems
label_desc: Use image node_id 25 for calling a global function with example usage: required(validator, required, instance, schema) without return types