lib/Ext/field/Checkbox.js
function(values) {
        this.getSameGroupFields().forEach(function(field) {
            field.setChecked((values.indexOf(field.getValue()) !== -1));
        });

        return this;
    }
function(values) {
        this.getSameGroupFields().forEach(function(field) {
            field.setChecked((values.indexOf(field.getValue()) !== -1));
        });

        return this;
    }
Set the status of all matched checkboxes in the same group to checked.
@param {Array} values An array of values.
@return {Ext.field.Checkbox} This checkbox.