Test of extending AutoCompleteTextField

MyTest.java

AutoCompleteTextField field = new AutoCompleteTextField(listModel) {
            @Override
            protected boolean filter(String text) {
                return getCityFilter(listModel, resultQuery, isFullAddressSearch).filter(text);
            }

            // https://github.com/codenameone/CodenameOne/issues/2757#event-2268199434
            @Override
            protected boolean shouldShowPopup() {
                return isEditable();
            }

            @Override
            public void setEditable(boolean isEditable) {
                super.setEditable(isEditable);
                if (!isEditable) {
                    this.removePopup();
                } 
            }

            /**
             * It's not safe: it can throw an Exception
             */
            private void removePopup() {
                Form f = getComponentForm();
                Component popup;
                if (f != null) {
                    popup = ComponentSelector.$("AutoCompletePopup", f).asComponent();
                    if (popup != null) {
                        // Keep attention: "popup.remove()" throws an Exception in some circumstances,
                        // see: http://disq.us/p/21cb38g
                        Container lay = f.getLayeredPane(super.getClass(), true);
                        Container parent = popup.getParent();
                        lay.removeComponent(parent);
                        // popup.remove();
                        f.revalidate();
                    }
                }
            }
        };