static/ext/src/ux/form/MultiSelect.js
function() {
        var me = this,
            delimiter = me.delimiter,
            val = me.getValue();
        
        return Ext.isString(delimiter) ? val.join(delimiter) : val;
    }
function() {
        var me = this,
            delimiter = me.delimiter,
            val = me.getValue();
        
        return Ext.isString(delimiter) ? val.join(delimiter) : val;
    }
Returns the value that would be included in a standard form submit for this field.

@return {String} The value to be submitted, or `null`.