# flutter_field_not_map

> Details about the flutter_field_not_map diagnostic produced by the Dart analyzer.



_The value of the 'flutter' field is expected to be a map._

## Description

The analyzer produces this diagnostic when the value of the `flutter` key
isn't a map.

## Example

The following code produces this diagnostic because the value of the
top-level `flutter` key is a string:

```yaml
name: example
flutter: [!true!]
```

## Common fixes

If you need to specify Flutter-specific options, then change the value to
be a map:

```yaml
name: example
flutter:
  uses-material-design: true
```

If you don't need to specify Flutter-specific options, then remove the
`flutter` key:

```yaml
name: example
```

