Command Pattern with Generic Return Type

I'm trying to implement the Command Pattern with a generic return type in Java.

After reviewing this answer on SO I created a Command class (interface) that looks like this:

public interface Command <T> {

    T execute(ArrayList<String> list, T type);
}


public class SearchResultsPage implements Command{

    @Override
    public <T extends List<ProductPOJO>>  T execute(ArrayList<String> list, T type) {

        List<ProductPOJO> productPOJOList = generatePOJOFromSearch(list);

        type.addAll(productPOJOList);

        return type;
}

}

However, Eclipse keeps complaining that:

The method execute(ArrayList, T) of type SearchResultsPage must override or implement a supertype method

When I click

Create execute() in supertype Command

Eclipse automatically creates method with exact same signature I created but the error message does not go away.

How can I fix this?

Thanks!