code: def getDOMImplementation(name=None, features=()):
      """getDOMImplementation(name = None, features = ()) -> DOM implementation.
  
      Return a suitable DOM implementation. The name is either
      well-known, the module name of a DOM implementation, or None. If
      it is not None, imports the corresponding module and returns
      DOMImplementation object if the import succeeds.
  
      If name is not given, consider the available implementations to
      find one with the required feature set. If no implementation can
      be found, raise an ImportError. The features list must be a sequence
      of (feature, version) pairs which are passed to hasFeature."""
  
      import os
  
      creator = None
      mod = well_known_implementations.get(name)
      if mod:
          mod = __import__(mod, {}, {}, ["getDOMImplementation"])
          return mod.getDOMImplementation()
      elif name:
          return registered[name]()
      elif (
          not sys.flags.ignore_environment
          and "PYTHON_DOM" in os.environ
      ):
          return getDOMImplementation(name=os.environ["PYTHON_DOM"])
  
      # User did not specify a name, try implementations in arbitrary
      # order, returning the one that has the required features
      if isinstance(features, str):
          features = _parse_feature_string(features)
      for creator in registered.values():
          dom = creator()
          if _good_enough(dom, features):
              return dom
  
      for creator in well_known_implementations.keys():
          try:
              dom = getDOMImplementation(name=creator)
          except Exception:  # typically ImportError, or AttributeError
              continue
          if _good_enough(dom, features):
              return dom
  
      raise ImportError("no suitable DOM implementation found")
  
imports: import sys
label_desc: Use image node_id 3 for calling a global function with example usage: getDOMImplementation(name, features) and returns: mod, registered, dom, dom, getDOMImplementation