    /**
     * Component layout for Ext.form.FieldSet components
     * @class Ext.layout.component.FieldSet
     * @extends Ext.layout.component.Body
     * @private
     */
    Ext.define('Ext.layout.component.FieldSet', {
        extend: 'Ext.layout.component.Body',
        alias: ['layout.fieldset'],

        type: 'fieldset',

        doContainerLayout: function() {
            // Prevent layout/rendering of children if the fieldset is collapsed
            if (!this.owner.collapsed) {
                this.callParent();
            }
        }
    });