public void addColumn(Column<T, ?> col, Header<?> header) {
        insertColumn(getColumnCount(), col, header);
    }
Adds a column to the end of the table with an associated header.

@param col    the column to be added
@param header the associated {@link Header}
stroom-core-client-widget/src/main/java/com/google/gwt/user/cellview/client/AbstractCellTable.java