class_docstr: internal structure for storing marks belonging to a node
  
  ..warning::
  
      unstable api
class_docstr_tok: ["internal","structure","for","storing","marks","belonging","to","a","node","..","warning",":",":","unstable","api"]
docstr: update the own markers
          
code: def update(self, add_markers):
      """update the own markers"""
      self.own_markers.extend(add_markers)
  
imports: import inspect
  import warnings
  from collections import namedtuple
  from operator import attrgetter
  import attr
  import six
  from ..compat import ascii_escaped
  from ..compat import ATTRS_EQ_FIELD
  from ..compat import getfslineno
  from ..compat import MappingMixin
  from ..compat import NOTSET
  from _pytest.deprecated import PYTEST_PARAM_UNKNOWN_KWARGS
  from _pytest.outcomes import fail
  from _pytest.warning_types import PytestUnknownMarkWarning
label_desc: Use image node_id 1 for calling the NodeMarkers obj's underlying member method code with example usage: obj.update(add_markers) without return types