Why is the data attribute of each block not accessible when getting a block by Index or Id?

First, this library is awesome!
Is there a specific reason why I can not access the current data structure for a block when doing something like this? Or am I missing something?.

```javascript
const block = this.api.getBlockByIndex(index)
block.data // data undefined
```

All I can access from the block object is...

```javascript
config: (...)
holder: (...)
id: (...)
isEmpty: (...)
name: (...)
selected: (...)
stretched: (...)
```