gt;(<wbr><span class="parameter" id="concatMap-param-mapper"><span class="type-annotation">Stream<span class="signature">&lt;<wbr><span class="type-parameter">S</span>&gt;</span></span> <span class="parameter-name">mapper</span>(<span class="parameter" id="mapper-param-value"><span class="type-annotation">T</span> <span class="parameter-name">value</span></span>)</span>)
      <div class="features">inherited</div>
    </section>
    <section class="desc markdown">
      <p>Maps each emitted item to a new <c