ass="type-parameter">T</span>&gt;</span>?</span> <span class="parameter-name">interpolator</span>, </span><span class="parameter" id="-param-defaultCurve"><span class="type-annotation"><a href="https://api.flutter.dev/flutter/animation/Curve-class.html">Curve</a>?</span> <span class="parameter-name">defaultCurve</span>, </span><span class="parameter" id="-param-evaluateCurve"><span class="type-annotation"><a href="../state_machine_animation/CurveEvaluator.html">CurveEvaluator</a><span class="signature">&lt;