form</a></span><span class="signature">&lt;<wbr><span class="type-parameter">S</span>&gt;</span><span class="signature">(<wbr><span class="parameter" id="transform-param-streamTransformer"><span class="type-annotation"><a href="dart-async/StreamTransformer-class.html">StreamTransformer</a><span class="signature">&lt;<wbr><span class="type-parameter"><a href="dart-io/RawSocketEvent-class.html">RawSocketEvent</a></span>, <span class="type-parameter">S</span>&gt;</span></span> <span class="parameter-name">stre