 by implicit conversion ArrowAssoc from<a href="" name="provingground.ProbabilityDistribution.Mixture" id="provingground.ProbabilityDistribution.Mixture" class="extype">Mixture</a>[<span name="provingground.ProbabilityDistribution.Mixture.A" class="extype">A</span>] to <span name="scala.Predef.ArrowAssoc" class="extype">ArrowAssoc</span>[<a href="" name="provingground.ProbabilityDistribution.Mixture" id="provingground.ProbabilityDistribution.Mixture" class="extype">Mixture</a>[<span name="provingground.Prob