tapestry-ioc/src/main/java/org/apache/tapestry5/ioc/internal/util/Orderer.java [162:180]:
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    public List<T> getOrdered()
    {
        lock.lock();

        initializeGraph();

        List<T> result = newList();

        for (Orderable<T> orderable : trailer.getOrdered())
        {
            T target = orderable.getTarget();

            // Nulls are placeholders that are skipped.

            if (target != null) result.add(target);
        }

        return result;
    }
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tapestry-ioc/src/main/java/org/apache/tapestry5/ioc/internal/util/IdToDependencyNode.java [123:141]:
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  public List<T> getOrdered()
  {
    lock.lock();

    initializeGraph();

    List<T> result = newList();

    for (Orderable<T> orderable : trailer.getOrdered())
    {
      T target = orderable.getTarget();

      // Nulls are placeholders that are skipped.

      if (target != null) result.add(target);
    }

    return result;
  }
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