# Package org.eclipse.viatra.query.tooling.ui.queryexplorer.content.matcher

- Class Summary
  Class | Description
  --- | ---
  BaseContent<ParentType> | Instances of this class represent contents of the tree viewer in the `QueryExplorer` on the various levels.
  CompositeContent<ParentType,ChildType extends BaseContent<?>> | A content in the `QueryExplorer`'s tree viewer with children elements.
  ContentChildren<E> | An `AbstractObservableList` implementation for the child elements of a `CompositeContent`.
  MatchComparator |
  PatternMatchContent | The bottom level element in the tree viewer of the `QueryExplorer`.
  PatternMatcherContent | The middle level element in the tree viewer of the `QueryExplorer`.
  PatternMatcherRootContent | A top level element in the `QueryExplorer`'s tree viewer, which is actually displayed.
  PatternMatcherRootContentKey | Instances of this class tie an `IEditorPart` and a `Notifier` together, which belong to a `RootContent` element in the `QueryExplorer`.
  QueryExplorerLabelProvider | A `ColumnLabelProvider` implementation of the `QueryExplorer`.
  QueryExplorerObservableFactory | An `IObservableFactory` implementation for the `QueryExplorer`.
  QueryExplorerTreeStructureAdvisor | A `TreeStructureAdvisor` implementation for the `QueryExplorer`.
  RootContent | An instance of this class represents the root element in the `QueryExplorer`'s tree viewer.
  TransformerFunction |