src/vs/workbench/browser/parts/editor/textDiffEditor.ts/TextDiffEditor/restoreTextDiffEditorViewState
class TextDiffEditor:	private restoreTextDiffEditorViewState(editor: DiffEditorInput, control: IDiffEditor): boolean {
		const resource = this.toDiffEditorViewStateResource(editor);
		if (resource) {
			const viewState = this.loadTextEditorViewState(resource);
			if (viewState) {
				control.restoreViewState(viewState);

				return true;
			}
		}

		return false;
	}