src/vs/workbench/api/browser/mainThreadNotebookKernels.ts/MainThreadNotebookKernels/$createExecution
class MainThreadNotebookKernels:	$createExecution(handle: number, controllerId: string, rawUri: UriComponents, cellHandle: number): void {
		const uri = URI.revive(rawUri);
		const execution = this._notebookExecutionStateService.createCellExecution(controllerId, uri, cellHandle);
		execution.confirm();
		this._executions.set(handle, execution);
	}