String" class="extype">String</span>] = <span class="symbol">None</span></span>, <span name="sources">sources: <span name="scala.List" class="extype">List</span>[<a href="../definitions/EventSourceReplace.html" name="com.ngrok.definitions.EventSourceReplace" id="com.ngrok.definitions.EventSourceReplace" class="extype">EventSourceReplace</a>] = <span class="symbol">List.empty</span></span>, <span name="destinationIds">destinationIds: <span name="scala.List" class="extype">List</span>[<span name="scala.Predef