protected String toStringSelector() {
        final EndpointSelector endpointSelector = selector.get();
        if (endpointSelector == null) {
            // Return selection strategy if selector is not created yet.
            return selectionStrategy.getClass().toString();
        }

        return endpointSelector.toString();
    }
Returns the string representation of the {@link EndpointSelector} of this {@link DynamicEndpointGroup}.
If the {@link EndpointSelector} is not created yet, it returns the class name of the
{@link EndpointSelectionStrategy}.
core/src/main/java/com/linecorp/armeria/client/endpoint/DynamicEndpointGroup.java