copySolo method
Implementation
void copySolo(ActorNodeSolo node, ActorArtboard resetArtboard) {
copyNode(node, resetArtboard);
_activeChildIndex = node._activeChildIndex;
}
void copySolo(ActorNodeSolo node, ActorArtboard resetArtboard) {
copyNode(node, resetArtboard);
_activeChildIndex = node._activeChildIndex;
}