src/vs/workbench/api/common/extHostWebviewPanels.ts/ExtHostWebviewPanels/createNewWebviewPanel
class ExtHostWebviewPanels:	public createNewWebviewPanel(webviewHandle: string, viewType: string, title: string, position: vscode.ViewColumn, options: extHostProtocol.IWebviewPanelOptions, webview: ExtHostWebview) {
		const panel = new ExtHostWebviewPanel(webviewHandle, this._proxy, viewType, title, position, options, webview);
		this._webviewPanels.set(webviewHandle, panel);
		return panel;
	}