before:
[
  { leaves => 3, name => "a", rockets => 2, type => 1 },
  {
    leaves  => 1,
    name    => "b",
    rockets => 4,
    samples => [
                 { dog => "fifi", name => "mary" },
                 { fish => "oscar", name => "john" },
               ],
    type    => 7,
  },
]
after:
{
  a => { leaves => 3, name => "a", rockets => 2, type => 1 },
  b => {
         leaves  => 1,
         name    => "b",
         rockets => 4,
         samples => {
                      john => { fish => "oscar", name => "john" },
                      mary => { dog => "fifi", name => "mary" },
                    },
         type    => 7,
       },
}