src/vs/workbench/contrib/notebook/browser/view/renderers/webviewPreloads.ts/Renderer/postDebugMessage
class Renderer:		private postDebugMessage(msg: string, data?: Record<string, string>) {
			postNotebookMessage<webviewMessages.ILogRendererDebugMessage>('logRendererDebugMessage', {
				message: `[renderer ${this.data.id}] - ${msg}`,
				data
			});
		}