code: def _scoped_name(name_scope, node_name):
      """Returns scoped name for a node as a string in the form '<scope>/<node
      name>'.
  
      Args:
        name_scope: a string representing a scope name, similar to that of tf.name_scope.
        node_name: a string representing the current node name.
  
      Returns
        A string representing a scoped name.
      """
      if name_scope:
          return "%s/%s" % (name_scope, node_name)
      return node_name
  
file_path: tensorboard/tensorboard/plugins/graph/keras_util.py
imports: from tensorboard.compat.proto.graph_pb2 import GraphDef
  from tensorboard.compat.tensorflow_stub import dtypes
label_desc: Use image node_id 2 for calling a global function with example usage: _scoped_name(name_scope, node_name) and returns: node_name, unknown