impl LiquiditySource for UniswapLiquiditySource {
    async fn get_liquidity() -> Result {
         //...
         Ok(Liquidity::Swap(/*... */))
    }
}

impl LiquiditySource for SushiSwapLiquiditySource {
    async fn get_liquidity() -> Result {
         //...
         Ok(Liquidity::Swap(/*... */))
    }
}