code: public <T> BehaviorTree<T> createBehaviorTree (String treeReference, T blackboard) {
  		return library.createBehaviorTree(treeReference, blackboard);
  	}
docs: Creates the {@link BehaviorTree} for the specified reference and blackboard object.
  @param treeReference the tree identifier, typically a path
  @param blackboard the blackboard object (it can be {@code null}).
  @return the tree cloned from the archetype.
  @throws SerializationException if the reference cannot be successfully parsed.
  @throws TaskCloneException if the archetype cannot be successfully parsed.