html">double</a></span> <span class="parameter-name">fontSize</span>, </span> <span class="parameter" id="-param-letterSpacing"><span class="type-annotation"><a href="dart-core/double-class.html">double</a></span> <span class="parameter-name">letterSpacing</span>, </span> <span class="parameter" id="-param-wordSpacing"><span class="type-annotation"><a href="dart-core/double-class.html">double</a></span> <span class="parameter-name">wordSpacing</span>, </span> <span class="parameter" id="-param-height"><span