void onUpdateFilterClicked(ClickEvent event) {
ArrayList<FilterOption> options = Lists.newArrayList();
// Iterate through each widget on the Filter Options Vertical Panel, as each of those will be
// a parameter to the filter.
for (Widget widget : filterOptions) {
ConstrainedParameterWidget param = (ConstrainedParameterWidget) widget;
String type = param.getParameterKey();
String value = param.getParameterValue();
FilterOption option = new FilterOption(type, value);
options.add(option);
}
String conjunction = anyOrAllBox.getValue(anyOrAllBox.getSelectedIndex());
attribute = stringToId(attributeBox.getValue(attributeBox.getSelectedIndex()));