extension PureYAML.Parsing {
    struct EventStreamContainer {
        var kind: EventStreamContainerKind
        var anchor: String?
        var values: [EventStreamComposedNode] = []
        var mergeSources: [[PureYAML.Model.Pair]] = []
        var localPairs: [PureYAML.Model.Pair] = []
        var pendingKey: PureYAML.Parsing.EventComposer.ComposedMappingKey?
        var mark: PureYAML.Parsing.Mark
    }
}