er</code> of this step does not exist, it moves on to the next one. It does this until one of the finders say that it has found the <code>UIViewController</code> described in the chain. Then <code><a href="Protocols/Router.html">Router</a></code> starts to move backwards through the chain of steps and starts to create the <code>UIViewController</code> for each step using its <code><a href="Protocols/Factory.html">Factory</a></code> and integrates it into the stack using the <code><a href="Core%20Entities.ht