src/vs/workbench/contrib/notebook/browser/services/notebookKernelServiceImpl.ts/SourceAction/runAction
class SourceAction:	async runAction() {
		if (this.execution) {
			return this.execution;
		}

		this.execution = this._runAction();
		this._onDidChangeState.fire();
		await this.execution;
		this.execution = undefined;
		this._onDidChangeState.fire();
	}