f9/sdk/dart/package-fuchsia_inspect_testing/NodeMatcher/property.md

# property method




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




[PropertyMatcher](../../package-fuchsia_inspect_testing/PropertyMatcher-class.md) property
(String name)





<p>Get a PropertyMatcher for a property on this node.</p>
<p>If the property cannot be found or is not a value type, an invalid
PropertyMatcher is returned.</p>



## Implementation

```dart
PropertyMatcher property(String name) {
  if (!_valid) {
    // No error, it would have been added creating the node itself.
    return PropertyMatcher._invalid(_parent);
  }

  int valueIndex = _parent._findNamedValue(name, _index);
  if (valueIndex == 0) {
    _parent._addError('Cannot find property $name');
    return PropertyMatcher._invalid(_parent);
  } else if ([
    BlockType.nodeValue,
    BlockType.tombstone,
    BlockType.nameUtf8,
    BlockType.extent
  ].contains(Block.read(_parent._holder, valueIndex).type)) {
    _parent._addError('Value $name found, but it is not a property type');
    return PropertyMatcher._invalid(_parent);
  }

  return PropertyMatcher._valid(_parent, valueIndex);
}
```