In the following methods 'groupped' should be 'grouped' org.apache.poi.hssf.usermodel.HSSFSheet void ungroupColumn(int fromColumn, int toColumn) Ungroup a range of columns that were previously groupped void ungroupRow(int fromRow, int toRow) Ungroup a range of rows that were previously groupped void setRowGroupCollapsed(int rowIndex, boolean collapse) Set view state of a groupped range of rows
Fixed in r1723445. This bug can be closed when the Javadocs are regenerated.
Javadocs republished, thanks for you help!