public void setRowStyles(RowStyles<T> rowStyles) {
        this.rowStyles = rowStyles;
    }
Sets the object used to determine how a row is styled; the change will take
effect the next time that the table is rendered.

@param rowStyles a {@link RowStyles} object
stroom-core-client-widget/src/main/java/com/google/gwt/user/cellview/client/AbstractCellTable.java