how to Use SliderNumber and objectList for plugin UI

The sliderNumber is a convenient and user-friendly UI element. When using it to create a plugin UI, how can I avoid errors? I’ve made some attempts below. Additionally, in previous versions, I was able to use <shadow type=”objectList”>, but it seems that it is not supported anymore in Verge3D 4.0, and it results in an error

` <value name=”THRESHOLD”>
<shadow type=”number_slider”>
<field name=”NUM” min=”0″ max=”10″ step=”0.1″>0.8</field>
</shadow>
</value>

<!– <value name=”VALUE”>
<shadow type=”objectList”>
<field name=”FIELDNAME”><none></field>
</shadow>
</value> –>

block.appendDummyInput()
.appendField(new Blockly.FieldNumber(1), ‘slideNumber’);