src/vs/workbench/contrib/webviewPanel/browser/webviewWorkbenchService.ts/WebviewEditorService/revealWebview
class WebviewEditorService:	public revealWebview(
		webview: WebviewInput,
		group: IEditorGroup | GroupIdentifier | ACTIVE_GROUP_TYPE | SIDE_GROUP_TYPE,
		preserveFocus: boolean
	): void {
		const topLevelEditor = this.findTopLevelEditorForWebview(webview);

		this._editorService.openEditor(topLevelEditor, {
			preserveFocus,
			// preserve pre 1.38 behaviour to not make group active when preserveFocus: true
			// but make sure to restore the editor to fix https://github.com/microsoft/vscode/issues/79633
			activation: preserveFocus ? EditorActivation.RESTORE : undefined
		}, group);
	}