What is the best way to end all nested and root conversations simultaneously?

Say you have this hierarchy:

LRC1 (root) with LRC2 (nested) and LRC3 (nested) and LRC4 (nested in LRC3).

Current LRC is LRC4.

If I do:

Conversation.instance().root().end();

will that do the trick?  and then what exactly will happen?  all the LRCs will be demoted to temp conversations one at a time?