example logic behind multiple container binding

gistfile1.php

## original execution container
$original = function($result)
{
  return "this is original execution";
}


## blocks of codes after multiple binding
## first (first-parent) container
$containers = function($result)
{
  ## maybe we can return something else, or execute error route, if something failed here.
  if($gotproblem) return "something else";

  ## Second (sub-parent) container
  return function($result)
  {
    ## Below is the original container.
    return function($result)
    {
      return "this is the original execution";
    };
  };
};