/**
		 * copy element including content, wai, attributes
		 *
		 *	$a = Element::create('a')->attr('href', 'http://google.de')->attr('id', 'google-link')->wai('role', 'button')
		 *		->content($span = Element::create('span')->content('link'));
		 *
		 *	$copy = $a->copy(Element::COPY_WAI | Element::COPY_CONTENT);
		 *
		 *	$span->content = 'Gooooooooooooooogle';
		 *
		 *	var_dump($a->render(), $copy->render());
		 *		string(94) "<a role="button" id="google-link" href="http://google.de"><span>Gooooooooooooooogle</span></a>"
		 *		string(38) "<a role="button"><span>link</span></a>"
		 *
		 */
		public function copy($__flag)
		{
		
			static $__STATIC_map;
			isset($__STATIC_map) ?: $__STATIC_map = function($__value)
			{
				return is_object($__value) ? clone $__value : $__value;
			};
			
			$Copy = new $this;
			
			$Copy->__Element = new $this->__Element
			(
				#! copy ADT attribute/wai/content
				$this->__Element->getTupleGC([__type_Element::parent, __type_Element::attribute, __type_Element::wai]),
				#! clone or create empty __type_Element sub tuple
				[
					__type_Element::attribute	=> self::COPY_ATTR === ($__flag & self::COPY_ATTR) ? clone $this->__Element->get()[__type_Element::attribute] : Invoke::emitClass($this->__ElementSetup[__type_Element::attribute]),
					__type_Element::wai		=> self::COPY_WAI === ($__flag & self::COPY_WAI) ? clone $this->__Element->get()[__type_Element::wai] : Invoke::emitClass($this->__ElementSetup[__type_Element::wai]),
					__type_Element::content		=> Invoke::emitClass($this->__ElementSetup[__type_Element::content], [static::$__tContent, self::COPY_CONTENT === ($__flag & self::COPY_CONTENT) ? FsbCollection::fromArray($this->__Element->get()[__type_Element::content]->get())->map($__STATIC_map, ['collect' => FALSE]) : []])
					
				]
				#! use element defaults
				+ $this->__ElementSetup
			);
			
			return $Copy;
		}