code: public static int copyToSheet(HSSFSheet parentSheet, int parentSheetRow, int parentSheetColumn, HSSFSheet sheet) {
  		return copyToSheet(parentSheet, parentSheetRow, parentSheetColumn, sheet, true);
  	}
docs: Copy a sheet to another sheet at a specific (row, column) position
  
  @param parentSheet the sheet to copy into
  @param parentSheetRow the row inside parentSheet where we start to copy
  @param parentSheetColumn the column inside parentSheet where we start to copy
  @param sheet the sheet that is copied
  @return column number