common/src/main/java/org/apache/nemo/common/ir/vertex/CachedSourceVertex.java [63:76]:
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  @Override
  public boolean isBounded() {
    // It supports only bounded source.
    return true;
  }

  @Override
  public List<Readable<T>> getReadables(final int desiredNumOfSplits) {
    // Ignore the desired number of splits.
    return readables;
  }

  @Override
  public long getEstimatedSizeBytes() {
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compiler/frontend/spark/src/main/java/org/apache/nemo/compiler/frontend/spark/source/SparkDatasetBoundedSourceVertex.java [82:93]:
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  @Override
  public boolean isBounded() {
    return true;
  }

  @Override
  public List<Readable<T>> getReadables(final int desiredNumOfSplits) {
    return readables;
  }

  @Override
  public long getEstimatedSizeBytes() {
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