$element->toHtmlnoClose() -- Output Open Tag and any children and not Child tag (designed for use with <form + hidden elements>
$factory->freeze() -- freeze - freeze's an element. - just copies the value to the override.
$factory->fromArray() -- fromArray - builds a set of elements from a key=>value array (eg. DO->toArray()) the second parameter is an optional HTML_Element array to merge it into.
$factory->fromArrayPrefixed() -- fromArrayPrefixed - takes a multi dimensional array, and builds the 'xxx[sss][xx]' => value