CommManager

Manages targets for comm messages from frontends.

See https://jupyter-client.readthedocs.io/en/5.2.3/messaging.html#custom-messages.

Adding a target with name "target_name" allows to receive messages from frontends. From the Jupyter classic UI, one can send messages to this target via code like

var comm = Jupyter.notebook.kernel.comm_manager.new_comm("target_name", '{"a": 2, "b": false}');
comm.open();
comm.send('{"c": 2, "d": {"foo": [1, 2]}}');