Basic.html#FlxBasic">FlxBasic</a></code> with a new one.
Does not do anything and returns <code>null</code> if the old object is not part of the group.</p><p class="javadoc">Parameters:</p><table class="table table-bordered params"><tr><th style="width:25%;"><code>OldObject</code></th><td><p>The object you want to replace.</p></td></tr><tr><th style="width:25%;"><code>NewObject</code></th><td><p>The new object you want to use instead.</p></td></tr></table><p class="javadoc">Returns:</p><div class="indent in