public DynamicEndpointGroupBuilder selectionStrategy(EndpointSelectionStrategy selectionStrategy) {
        this.selectionStrategy = requireNonNull(selectionStrategy, "selectionStrategy");
        return this;
    }
Sets the {@link EndpointSelectionStrategy} of the {@link DynamicEndpointGroup}.
If unspecified, {@link EndpointSelectionStrategy#weightedRoundRobin()} is used.
core/src/main/java/com/linecorp/armeria/client/endpoint/DynamicEndpointGroupBuilder.java