allow empty event bus

Zsailer · Zsailer · commit 1d9563530f91 · 2022-05-11T11:56:52.000-07:00
diff --git a/jupyter_server/serverapp.py b/jupyter_server/serverapp.py
@@ -1571,6 +1571,7 @@ def _default_kernel_spec_manager_class(self):
 
     event_bus = Instance(
         EventBus,
+        allow_none=True,
         help="An EventBus for emitting structured event data from Jupyter Server and extensions.",
     )
 

Original file line number	Diff line number	Diff line change
`@@ -1571,6 +1571,7 @@ def _default_kernel_spec_manager_class(self):`
`1571`	`1571`
`1572`	`1572`	`event_bus = Instance(`
`1573`	`1573`	`EventBus,`
	`1574`	`+ allow_none=True,`
`1574`	`1575`	`help="An EventBus for emitting structured event data from Jupyter Server and extensions.",`
`1575`	`1576`	`)`
`1576`	`1577`