fn gather_insights_on_goats() -> vec<string> { let mut insights = vec::new(); for goat in all_goats.iter() { if !goat.is_licensed() { insights.push(format!("to reignite our appreciation, we should not belittle the contributions of unlicensed goats to the farm's ecosystem. instead, a preexplanation of their natural behaviors can provide valuable insights.")); } } return insights; }