Calling a function which is outside the component same as explained in issue #395

I am calling a function which is outside the component same as explained in issue #395
but it is returning a string instead of a function
I want to call defaults.drawGauge function in script and pass the id that is created dynamically

I am stuck please help me out
grapesjs.plugins.add('liquid-gauge-plugin', function(editor, options){


    let defaults = {
        // this function has to be called in  component script
        drawGauge:function(id){
            alert("draw" + id);
        }
    }

    for (let name in defaults) {
        if (!(name in options))
            options[name] = defaults[name];
    }
    var domComponents = editor.BlockManager;
    domComponents.add('h1-block', {
        id: 'liquid',
        label: 'Liquid Gauge',
        category: 'plugin',
        attributes: {
            class: 'fa fa-square-o'
        },
        style: {
            padding: '100px'
        },
        content: {
            type: 'liquid'
        }
    });

    // Get DomComponents module
    var comps = editor.DomComponents;

    // Get the model and the view from the default Component type
    var defaultType = comps.getType('default');
    var defaultModel = defaultType.model;
    var defaultView = defaultType.view;
    comps.addType('liquid', {
        model: defaultModel.extend({
                defaults: Object.assign({}, defaultModel.prototype.defaults, {
                    removable: true,
                    d: options.drawGauge,
                    draggable: true,
                    editable: true,
                    copyable: true,
                    badgable: true,
                    highlightable: true,
                    resizable: true,
                    droppable: true,
                    content: `<svg style="width:90%"; >
                    </svg>`,
                    script: function() {
                        console.log(this.id);
                        // I want to call defaults.drawGauge function here and pass this.id
                        var di =   `{[ d ]}`;
                        console.log(typeof(di));

                    },

                    traits: [

                        {
                            type: 'color',
                            label: 'Circle',
                            name: 'circles',
                            changeProp: 1,
                            // and update once traits changes
                            // options: options.drawGauge.update()
                        },
                        {
                            type: 'color',
                            label: 'wave',
                            name: 'wave',
                            changeProp: 1
                        },
                        {
                            type: 'color',
                            label: 'waveText',
                            name: 'waveText',
                            changeProp: 1
                        },
                        {
                            type: 'color',
                            label: 'Text Color',
                            name: 'textColor',
                            changeProp: 1
                        },
                    ],
                })
            },
            {
                isComponent: function(el) {
                    if (el.tagName == 'LIQUID') {
                        return {
                            type: 'liquid'
                        };
                    }
                },
            }),

        // Define the View
        view: defaultType.view.extend({

            render: function() {
                defaultType.view.prototype.render.apply(this, arguments);
                return this;
            },
        }),
    });
})