Returns the deepest common ancestor timescope from the first element in the linearPath to the last element in the linearPath and the destination, and the actionIds to the next element for the linearPath, and destination.
Returns all the leaf-level overriding pokes, not include the argument timescope (if it has overriding pokes)
Returns the linear path from startTimescope (as the first element, inclusive) to destTimescope (as the last element, inclusive) destActionId is the actionId in destTimescope to the next timescope (or the action of interest)