### Question:
CSVToARFFHeaderMapTask implements OptionHandler, Serializable { public Instances getHeader() { return makeStructure(); } CSVToARFFHeaderMapTask();  CSVToARFFHeaderMapTask(boolean suppressQuantileOptions);  CSVToARFFHeaderMapTask(boolean suppressQuantileOptions,
    boolean suppressCSVParsingOptions); static void updateSummaryStats(Map<String, Stats> summaryStats,
    Map<String, StringStats> backupStringStats, String attName, double value,
    String nominalLabel, boolean isNominal, boolean isString,
    boolean treatZeroAsMissing, boolean estimateQuantiles,
    double quantileCompression); static List<String> instanceHeaderToAttributeNameList(Instances header); static void main(String[] args); static CSVToARFFHeaderMapTask combine(
    List<CSVToARFFHeaderMapTask> tasks); @Override Enumeration<Option> listOptions(); @Override String[] getOptions(); @Override void setOptions(String[] options); void setNumDecimalPlaces(int numDecimalPlaces); int getNumDecimalPlaces(); void setTreatUnparsableNumericValuesAsMissing(
    boolean unparsableNumericValuesToMissing); boolean getTreatUnparsableNumericValuesAsMissing(); boolean getTreatZerosAsMissing(); void setTreatZerosAsMissing(boolean t); double getCompressionLevelForQuartileEstimation(); void setCompressionLevelForQuartileEstimation(double compression); String compressionLevelForQuartileEstimationTipText(); boolean getComputeQuartilesAsPartOfSummaryStats(); void setComputeQuartilesAsPartOfSummaryStats(boolean c); String computeQuartilesAsPartOfSummaryStatsTipText(); String getMissingValue(); void setMissingValue(String value); String missingValueTipText(); String getStringAttributes(); void setStringAttributes(String value); String stringAttributesTipText(); String getNominalAttributes(); void setNominalAttributes(String value); String nominalAttributesTipText(); String getDateFormat(); void setDateFormat(String value); String dateFormatTipText(); String getDateAttributes(); void setDateAttributes(String value); String dateAttributesTipText(); String enclosureCharactersTipText(); String getEnclosureCharacters(); void setEnclosureCharacters(String enclosure); String getFieldSeparator(); void setFieldSeparator(String value); String fieldSeparatorTipText(); String nominalDefaultLabelSpecsTipText(); Object[] getNominalDefaultLabelSpecs(); void setNominalDefaultLabelSpecs(Object[] specs); String nominalLabelSpecsTipText(); Object[] getNominalLabelSpecs(); void setNominalLabelSpecs(Object[] specs); void generateNames(int initial, int numAtts); void generateNames(int numAtts); void initParserOnly(List<String> attNames); String[] parseRowOnly(String row); void processRowValues(Object[] fieldVals, List<String> attNames); void processRow(String row, List<String> attNames); Instances getHeader(); HeaderAndQuantileDataHolder getHeaderAndQuantileEstimators(); void serializeAllQuantileEstimators(); void deSerializeAllQuantileEstimators(); boolean headerAvailableImmediately(int numFields,
    List<String> attNames, StringBuffer problems); Instances getHeader(int numFields, List<String> attNames); void fromHeader(Instances headerWithSummary,
    Map<String, TDigest> quantileEstimators); Instance makeInstance(Instances trainingHeader,
    boolean setStringValues, String[] parsed); Instance makeInstance(Instances trainingHeader,
    boolean setStringValues, String[] parsed, boolean sparse); Instance makeInstanceFromObjectRow(Instances trainingHeader,
    boolean setStringValues, Object[] row, boolean sparse); String getDefaultValue(int attIndex); static final String ARFF_SUMMARY_ATTRIBUTE_PREFIX; static final int MAX_PARSING_ERRORS; }### Answer:
@Test public void testGetHeaderWithoutProcessing() throws Exception { CSVToARFFHeaderMapTask task = new CSVToARFFHeaderMapTask(); Instances i = task.getHeader(10, null); for (int j = 0; j < i.numAttributes(); j++) { assertTrue(i.attribute(j).isNumeric()); } }