I'm new to developing nodes and would very much appericate a helping hand. My objective is to change the exisiting multistate switch module so that it would incorporate the same pass through feature as the ui_switch module. The desired result is as follows:
- no messages are pass through
 - the user interface, i.e. the "icon", shows the state of the input message
 
To start with, I would need to understand the following. What part of ui_switch.html and/or ui_switch.js "prevents" the state icon from changing from off to on in the following example?
[
    {
        "id": "4e92b883d06ffe99",
        "type": "inject",
        "z": "822bc1ad5f56e898",
        "name": "",
        "props": [
            {
                "p": "payload"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": true,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "false",
        "payloadType": "bool",
        "x": 310,
        "y": 280,
        "wires": [
            [
                "15a5658ebe1b3fa9",
                "11fa7d2da42c9ef4"
            ]
        ]
    },
    {
        "id": "11fa7d2da42c9ef4",
        "type": "ui_multistate_switch",
        "z": "822bc1ad5f56e898",
        "name": "Multistate switch",
        "group": "512e9e663b47903c",
        "order": 6,
        "width": 0,
        "height": 1,
        "label": "switch",
        "stateField": "payload",
        "enableField": "enable",
        "passthroughField": "passthrough",
        "inputMsgField": "inputmsg",
        "rounded": true,
        "useThemeColors": true,
        "hideSelectedLabel": false,
        "multilineLabel": false,
        "passThrough": "always",
        "inputMsg": "all",
        "userInput": "enabled_show",
        "options": [
            {
                "label": "FALSE",
                "value": "false",
                "valueType": "bool",
                "color": "#009933"
            },
            {
                "label": "TRUE",
                "value": "true",
                "valueType": "bool",
                "color": "#999999"
            }
        ],
        "topic": "",
        "x": 590,
        "y": 340,
        "wires": [
            [
                "eb87e38c66bae324"
            ]
        ]
    },
    {
        "id": "15a5658ebe1b3fa9",
        "type": "ui_switch",
        "z": "822bc1ad5f56e898",
        "name": "",
        "label": "simple switch (no pass through, icon shows state of input)",
        "tooltip": "",
        "group": "512e9e663b47903c",
        "order": 15,
        "width": 0,
        "height": 0,
        "passthru": false,
        "decouple": "true",
        "topic": "topic",
        "topicType": "msg",
        "style": "",
        "onvalue": "true",
        "onvalueType": "bool",
        "onicon": "",
        "oncolor": "",
        "offvalue": "false",
        "offvalueType": "bool",
        "officon": "",
        "offcolor": "",
        "animate": false,
        "className": "",
        "x": 730,
        "y": 280,
        "wires": [
            [
                "f685404e048b5243",
                "ad08d9a3189a5588"
            ]
        ]
    },
    {
        "id": "c0efebd66f52f5c3",
        "type": "inject",
        "z": "822bc1ad5f56e898",
        "name": "",
        "props": [
            {
                "p": "payload"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "true",
        "payloadType": "bool",
        "x": 310,
        "y": 340,
        "wires": [
            [
                "11fa7d2da42c9ef4",
                "15a5658ebe1b3fa9"
            ]
        ]
    },
    {
        "id": "f685404e048b5243",
        "type": "debug",
        "z": "822bc1ad5f56e898",
        "name": "debug 2",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": true,
        "complete": "payload",
        "targetType": "msg",
        "statusVal": "payload",
        "statusType": "auto",
        "x": 1090,
        "y": 280,
        "wires": []
    },
    {
        "id": "eb87e38c66bae324",
        "type": "debug",
        "z": "822bc1ad5f56e898",
        "name": "debug 3",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": true,
        "complete": "payload",
        "targetType": "msg",
        "statusVal": "payload",
        "statusType": "auto",
        "x": 1090,
        "y": 340,
        "wires": []
    },
    {
        "id": "ad08d9a3189a5588",
        "type": "delay",
        "z": "822bc1ad5f56e898",
        "name": "Simulation of Eltako FSR14x acutuator",
        "pauseType": "delay",
        "timeout": "5",
        "timeoutUnits": "seconds",
        "rate": "1",
        "nbRateUnits": "1",
        "rateUnits": "second",
        "randomFirst": "1",
        "randomLast": "5",
        "randomUnits": "seconds",
        "drop": false,
        "allowrate": false,
        "outputs": 1,
        "x": 1190,
        "y": 160,
        "wires": [
            [
                "15a5658ebe1b3fa9"
            ]
        ]
    },
    {
        "id": "512e9e663b47903c",
        "type": "ui_group",
        "name": "Yleisohjaus",
        "tab": "fa7d8b45bcb564c4",
        "order": 1,
        "disp": true,
        "width": "6",
        "collapse": true,
        "className": ""
    },
    {
        "id": "fa7d8b45bcb564c4",
        "type": "ui_tab",
        "name": "Valot",
        "icon": "dashboard",
        "disabled": false,
        "hidden": false
    }
]
            