public ArrayList<String> getColumns() {
		ArrayList<String> columns = new ArrayList<String>();
		for (String col : columnLookup.keySet()) {
			HeaderInfo hi = columnLookup.get(col);
			if (!hi.isHide()) {
				columns.add(col);
			}
		}
		return columns;
	}
public ArrayList < String > getColumns ( ) { ArrayList < String > columns = new ArrayList < String > ( ) ; for ( String col : columnLookup . keySet ( ) ) { HeaderInfo hi = columnLookup . get ( col ) ; if ( ! hi . isHide ( ) ) { columns . add ( col ) ; } } return columns ; }
Get the list of column names. Does not include hidden columns

@return