</span> * Creates the passed DomHelper config and appends it to this element or optionally inserts it before the passed child element.
* @param {Object} config DomHelper element config object. If no tag is specified (e.g., {tag:'input'}) then a div will be
* automatically generated with the specified attributes.
* @param {HTMLElement} insertBefore (optional) a child element of this element
* @param {Boolean} returnDom (optional) true to return the dom node instead of creating an Element
</span> * Creates the passed DomHelper config and appends it to this element or optionally inserts it before the passed child element.
* @param {Object} config DomHelper element config object. If no tag is specified (e.g., {tag:'input'}) then a div will be
* automatically generated with the specified attributes.
* @param {HTMLElement} insertBefore (optional) a child element of this element
* @param {Boolean} returnDom (optional) true to return the dom node instead of creating an Element