Feature: Go to implementation for functional consumer interfaces

[oysandvik94]

I am not able to go to the implementation of a consumer function that is passed in as an argument to a function.

Given the following code example:

import java.util.List;
import java.util.function.Consumer;

public class Test {
    public class Message {
        private String messageName;
    }

    public void consumeMeldinger(List<List<Message>> messagePartitions,
            Consumer<List<? extends Message>> messageConsumer) {
        for (List<Message> listToSend : messagePartitions) {
            messageConsumer.accept(listToSend); // Cursor here, on accept
        }
    }

    public void test() {
        this.consumeMeldinger(null, (messages -> this.send((List<Message>) messages)));
    }

    public String send(List<Message> messageList) {
        return "";
    }

}

If the cursor is placed on the "accept" call on messageConsumer (see comment), and I call "GoToImplementation", I get error code 32603.

In IntelliJ, you would get a list of implementations, and given the complexity of the project, this list can be very large or very small.

I realize that this is probably really hard to implement, but I couldn't find an existing issue.