f9/sdk/dart/package-fuchsia_inspect_inspect/Node/boolProperty.md

# boolProperty method




    *[<Null safety>](https://dart.dev/null-safety)*




[BoolProperty](../../package-fuchsia_inspect_inspect/BoolProperty-class.md)? boolProperty
(String name)





<p>Returns an <a href="../../package-fuchsia_inspect_inspect/BoolProperty-class.md">BoolProperty</a> with <code>name</code> on this node.</p>
<p>If an <a href="../../package-fuchsia_inspect_inspect/BoolProperty-class.md">BoolProperty</a> with <code>name</code> already exists and is not
deleted, this method returns it.</p>
<p>Otherwise, it creates a new property initialized to false.</p>
<p>Throws <a href="../../package-fuchsia_inspect_inspect/InspectStateError-class.md">InspectStateError</a> if a non-deleted property with <code>name</code>
already exists but it is not a <a href="../../package-fuchsia_inspect_inspect/BoolProperty-class.md">BoolProperty</a>.</p>



## Implementation

```dart
BoolProperty? boolProperty(String name) {
  if (_writer == null) {
    return BoolProperty._deleted();
  }
  if (_properties.containsKey(name)) {
    if (_properties[name] is! BoolProperty) {
      throw InspectStateError(
          "Can't create BoolProperty named $name; a different type exists.");
    }
    return _properties[name] as BoolProperty?;
  }
  return _properties[name] = BoolProperty._(name, this, _writer!);
}
```