```adf:codeBlock
{
  "attrs": {
    "language": "js"
  },
  "content": [
    {
      "marks": [
        {
          "type": "strong"
        }
      ],
      "text": "const a = 1",
      "type": "text"
    }
  ]
}
```

```adf:codeBlock
{
  "content": [
    {
      "text": "a",
      "type": "text"
    },
    {
      "type": "hardBreak"
    }
  ]
}
```