maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/visitor/PostorderDependencyNodeConsumerVisitor.java [46:60]:
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        visits = new Stack<>();
    }

    @Override
    public boolean visitEnter(DependencyNode node) {
        boolean visited = !setVisited(node);
        visits.push(visited);
        return !visited;
    }

    @Override
    public boolean visitLeave(DependencyNode node) {
        Boolean visited = visits.pop();
        if (visited) {
            return true;
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maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/visitor/PostorderNodeListGenerator.java [46:63]:
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        visits = new Stack<>();
    }

    @Override
    public boolean visitEnter(DependencyNode node) {
        boolean visited = !setVisited(node);

        visits.push(visited);

        return !visited;
    }

    @Override
    public boolean visitLeave(DependencyNode node) {
        Boolean visited = visits.pop();

        if (visited) {
            return true;
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