function labelEscape(code) {
    if (
      code === codes.leftSquareBracket ||
      code === codes.backslash ||
      code === codes.rightSquareBracket
    ) {
      effects.consume(code)
      size++
      return labelInside
    }

    return labelInside(code)
  }
After `\`, at a special character.

```markdown
> | [a\*a]
       ^
```

@type {State}