code: public function append($element) {
  			if ( true === $element instanceof \SVGCreator\Element ) {
  				$this->childElements[] = $element;
  				return $element;
  			} else {
  				$elementCreated = $this->factoryElement($element);
  				$this->childElements[] = $elementCreated;
  				return $elementCreated;
  			}
  		}
docs: Appends an element to the current element
  
  @param  mixed            	$element 	The element to append to this element could be an object \SVGCreator\Element or a string of the type to create
  
  @return \SVGCreator\Element 				The element append