static EndpointSelectionStrategy weightedRoundRobin() {
        return WeightedRoundRobinStrategy.INSTANCE;
    }
Returns a weighted round-robin strategy. The endpoint is selected using
<a href="https://en.wikipedia.org/wiki/Weighted_round_robin#Interleaved_WRR">Interleaved WRR</a>
algorithm.

@see #roundRobin()
@see #sticky(ToLongFunction)
core/src/main/java/com/linecorp/armeria/client/endpoint/EndpointSelectionStrategy.java