I have a Map

```
Map<Integer, List<Object>> entireData;

```

Now to this I'm adding some data using putAll like

```
entireData.putAll(someData);

```

where someData returns `Map<Integer, List<Object>>`

Now, I have another line which says

```
entireData.putAll(someMoreData);

```

which also returns `Map<Integer, List<Object>>`, but by doing this it over-writes the content of the existing entireData, how do I append?