public static <T_ROW> ColumnBuilder<T_ROW, String, Cell<String>> textWithTooltipColumnBuilder(
            final Function<T_ROW, String> valueExtractor) {
        return textWithTooltipColumnBuilder(valueExtractor, Function.identity());
    }
A simple text cell with the value of the cell also as the hover tool tip value.
stroom-core-client/src/main/java/stroom/util/client/DataGridUtil.java