LawOfDemeter

public class Foo {
    /**
     * This example will result in two violations.
     */
    public void example(Bar b) {
        // this method call is ok, as b is a parameter of "example"
        C c = b.getC();
        
        // this method call is a violation, as we are using c, which we got from B.
        // We should ask b directly instead, e.g. "b.doItOnC();"
        c.doIt();
        
        // this is also a violation, just expressed differently as a method chain without temporary variables.
        b.getC().doIt();
        
        // a constructor call, not a method call.
        D d = new D();
        // this method call is ok, because we have create the new instance of D locally.
        d.doSomethingElse(); 
    }
}

你的list是一个参数吧，LawOfDemeter規則是期望你的參數提供方法直接調用，而不使用方法返回的對象（這個對像不是在方法內部創建的），再調用對象的函數，可以參考上面的示例修改。
如果無法修改那就把這個規則排除掉吧。這個規則有點苛刻。