nlp-utils/src/main/java/org/apache/opennlp/utils/cfg/ContextFreeGrammar.java [79:93]:
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  private Collection<String> getTerminals(String word) {
    if (terminalSymbols.contains(word)) {
      Collection<String> c = new LinkedList<>();
      c.add(word);
      return c;
    } else {
      assert nonTerminalSymbols.contains(word) : "word " + word + " is not contained in non terminals";
      String[] expansions = getExpansionForSymbol(word);
      Collection<String> c = new LinkedList<>();
      for (String e : expansions) {
        c.addAll(getTerminals(e));
      }
      return c;
    }
  }
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nlp-utils/src/main/java/org/apache/opennlp/utils/cfg/ProbabilisticContextFreeGrammar.java [99:113]:
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  private Collection<String> getTerminals(String word) {
    if (terminalSymbols.contains(word)) {
      Collection<String> c = new LinkedList<>();
      c.add(word);
      return c;
    } else {
      assert nonTerminalSymbols.contains(word) : "word " + word + " is not contained in non terminals";
      String[] expansions = getExpansionForSymbol(word);
      Collection<String> c = new LinkedList<>();
      for (String e : expansions) {
        c.addAll(getTerminals(e));
      }
      return c;
    }
  }
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