{
addition : {
value : "foo",
key : "bar"
}
}
{
deletions : {
key : "bar"
}
}
{
addition : {
index : 4,
value : ["bar"]
}
}
{
addition : {
index : 0,
value : ["foo"]
}
}
{
deletions : [0,0]
}
{
deletions : [5,5]
}
{}
{}
{
deletions : [3,6],
additions : {
index : 3
values : ["foo", "bar"]
}
}