src/vs/workbench/api/common/extHostNotebookDocument.ts/ExtHostCell/setInternalMetadata
class ExtHostCell:	setInternalMetadata(newInternalMetadata: notebookCommon.NotebookCellInternalMetadata): void {
		this._internalMetadata = newInternalMetadata;
		this._previousResult = Object.freeze(extHostTypeConverters.NotebookCellExecutionSummary.to(newInternalMetadata));
	}