src/vs/workbench/contrib/terminal/electron-sandbox/localTerminalBackend.ts/LocalTerminalBackend/updateIcon
class LocalTerminalBackend:	async updateIcon(id: number, userInitiated: boolean, icon: URI | { light: URI; dark: URI } | { id: string; color?: { id: string } }, color?: string): Promise<void> {
		await this._localPtyService.updateIcon(id, userInitiated, icon, color);
	}