gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/SelectOneStep.java [138:147]:
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    public HashSet<PopInstruction> getPopInstructions() {
        final HashSet<PopInstruction> popInstructions = new HashSet<>();
        final Set<String> labels = this.getScopeKeys();
        for (String label : labels) {
            final PopInstruction scopingInfo = new PopInstruction(this.getPop(), label);
            popInstructions.add(scopingInfo);
        }
        popInstructions.addAll(TraversalParent.super.getPopInstructions());
        return popInstructions;
    }
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gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/TraversalSelectStep.java [89:98]:
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    public HashSet<PopInstruction> getPopInstructions() {
        final HashSet<PopInstruction> popInstructions = new HashSet<>();
        final Set<String> labels = this.getScopeKeys();
        for (String label : labels) {
            final PopInstruction scopingInfo = new PopInstruction(this.getPop(), label);
            popInstructions.add(scopingInfo);
        }
        popInstructions.addAll(TraversalParent.super.getPopInstructions());
        return popInstructions;
    }
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