= R"(
<root main_tree_to_execute = "MainTree" >
<BehaviorTree ID="CrossDoorSubtree">
<Sequence name="door_sequence">
<Decorator ID="Inverter">
<Action ID="IsDoorLocked" />
</Decorator>
<Action ID="OpenDoor" />
<Action ID="PassThroughDoor" />
<Action ID="CloseDoor" />
</Sequence>
</BehaviorTree>
<!-- This tree will include the other one -->
<BehaviorTree ID="MainTree">
<Fallback name="root_selector">
<SubTree ID="CrossDoorSubtree" />
<Action ID="PassThroughWindow" />
</Fallback>
</BehaviorTree>
</root>
)"