code: def propertyNames(validator, propertyNames, instance, schema):
      if not validator.is_type(instance, "object"):
          return
  
      for property in instance:
          for error in validator.descend(
              instance=property,
              schema=propertyNames,
          ):
              yield error
  
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 2 for calling a global function with example usage: propertyNames(validator, propertyNames, instance, schema) without return types