Question about Jupyter Events for NBExtensions

I have some code in an NB extension that is dependent on to be populated. Due to how I"m loading the extension, the kernel is sometimes not ready by the time the extension is loaded. I tried using the kernel_ready.Kernel event but it seems when it’s fired, the is still not populated.

What’s an event that I could use which would ensure that the notebook object and the kernel object are completely populated?