Transactions apply across full object graphs. The fact that it uses a KV store under the hood is exposed to you, but it doesn't impose limits. For example if y

Transactions apply across full object graphs. The fact that it uses a KV store under the hood is exposed to you, but it doesn't impose limits. For example if you read an object, read some fields, follow a reference to another object, loop over a list you find there, then make some changes and commit, the underlying transaction will only apply if those operations are conflict free.