We have an multidimensional array which we want to flatten to one array

```
'data': [
0: [
0: {.A.},
1: {.B.}
],
1: [
0: {.C.},
1: {.D.}
],
2: [
0: {.E.}
]
]
```

The result should be:

```
'result': [
0: {.A.},
1: {.B.},
2: {.C.},
3: {.D.},
4: {.E.}
]
```

The amount of elements in arr1 can differ just as te amount of element in the sub arrays.

We tried a lot of different combinations of these transformers.

-Node, transform nodes

-Move using a pattern

-Operator Transformer (Array Merge)

-Move data between accessors

But nothing gives us the result we want, how can we get the result we want?