code: protected void setup(SuggestOracle suggestions) {
  
          if (itemBoxKeyDownHandler != null) {
              itemBoxKeyDownHandler.removeHandler();
          }
  
          list.setStyleName(AddinsCssName.MULTIVALUESUGGESTBOX_LIST);
          this.suggestions = suggestions;
          final ListItem item = new ListItem();
  
          item.setStyleName(AddinsCssName.MULTIVALUESUGGESTBOX_INPUT_TOKEN);
  
          suggestBox = new SuggestBox(suggestions, itemBox);
          suggestBox.addSelectionHandler(selectionEvent -> {
              Suggestion selectedItem = selectionEvent.getSelectedItem();
              itemBox.setValue("");
              if (addItem(selectedItem)) {
                  ValueChangeEvent.fire(MaterialAutoComplete.this, getValue());
              }
              itemBox.setFocus(true);
          });
  
          loadHandlers();
  
          setLimit(this.limit);
          String autocompleteId = DOM.createUniqueId();
          itemBox.getElement().setId(autocompleteId);
  
          item.add(suggestBox);
          item.add(label);
          list.add(item);
  
          panel.add(list);
          panel.getElement().setAttribute("onclick",
                  "document.getElementById('" + autocompleteId + "').focus()");
          panel.add(errorLabel);
          suggestBox.setFocus(true);
      }
docs: Generate and build the List Items to be set on Auto Complete box.