[]
Serializable, Comparable<SummaryColumn>, ConstableUsed with IOutline.setSummaryColumn(SummaryColumn) to control whether the summary column appears to the left or right of the detail columns in a column grouping.
worksheet.getOutline().setSummaryColumn(SummaryColumn.Left);
worksheet.getRange("A:E").group();
worksheet.getRange("A:C").group();
Enum.EnumDesc<E extends Enum<E>>static SummaryColumnstatic SummaryColumn[]values()name - the name of the enum constant to be returned.IllegalArgumentException - if this enum class has no constant with the specified nameNullPointerException - if the argument is null