"someData":
     |_______>"01":  (take note this is a key:value, not intended to be array index)
     |          |_______"child1"
     |          |_______"child2"
     |_______>"02":
                |_______"child3"
                |_______"child4"

var ref = new Firebase("https://myURL.firebaseio.com/someData");
var sync = $firebase(ref);
var someData = sync.$asObject();

"someData" [with its children stored as OBJECT]:
     |_______>"01"  [with its children stored as OBJECT]:
     |          |_______"child1"
     |          |_______"child2"
     |_______>"02"  [with its children stored as OBJECT]
                |_______"child3"
                |_______"child4"

"someData" [with its children stored as ARRAY]:
     |_______>"01"  [with its children stored as OBJECT]:
     |          |_______"child1"
     |          |_______"child2"
     |_______>"02"  [with its children stored as OBJECT]
                |_______"child3"
                |_______"child4"