Boolean if this is the first {@link TransitionAction.appear} transition.
This will be true during the first transition if
{@link TransitionAction.appear} was also true. Otherwise it will be
false.
Boolean if the element should be rendered or not. This will always be
true if the TransitionOptions.temporary is false. Otherwise, it
will be true when not the "exited" TransitionStage.
{@inheritDoc TransitionStage}
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@since 4.0.0