code: private static Method lambdaMethod(SerializedLambda serializedLambda) {
          Class<?> containingClass = getClassForName(serializedLambda.getImplClass());
          String implMethodName = serializedLambda.getImplMethodName();
          return getMethod(containingClass, implMethodName);
      }
docs: <ol>
  <li>Serializes lambda to SerializedLambda</li>
  <li>Finds containing class - class where the lambda method is implemented</li>
  <li>Finds the method in the containing class</li>
  </ol>