protected function getPathPart(SimpleXMLElement $xmlElement, $onlyFilled){

		$path = '';

		if($xmlElement === null){
			$xmlElement = $this->xmlDocument;
		}

		foreach($xmlElement->children() as $child){
			$childName = $child->getName();
			if(!empty($child['transform'])){
				throw new \Exception('Transforms are currently not supported!');
			}
			if($childName === 'g'){
				$path .= ' '.$this->getPathPart($child, $onlyFilled);
			}
			else{
				if($onlyFilled && (string)$child['fill'] === 'none'){
					continue;
				}
				if($childName === 'polygon'){
					$path .= ' '.$this->getPathFromPolygon($child);
				}
				elseif($childName === 'rect'){
					$path .= ' '.$this->getPathFromRect($child);
				}
				elseif($childName === 'circle'){
					$path .= ' '.$this->getPathFromCircle($child);
				}
				elseif($childName === 'ellipse'){
					$path .= ' '.$this->getPathFromEllipse($child);
				}
				elseif($childName === 'path'){
					$pathPart = trim($child['d']);
					if(substr($pathPart, 0, 1) === 'm'){
						$pathPart = 'M'.substr($pathPart, 1);
					}
					$path .= ' '.$pathPart;
				}
			}
		}

		return trim($path);

	}
protected function getPathPart(SimpleXMLElement $xmlElement, $onlyFilled){

		$path = '';

		if($xmlElement === null){
			$xmlElement = $this->xmlDocument;
		}

		foreach($xmlElement->children() as $child){
			$childName = $child->getName();
			if(!empty($child['transform'])){
				throw new \Exception('Transforms are currently not supported!');
			}
			if($childName === 'g'){
				$path .= ' '.$this->getPathPart($child, $onlyFilled);
			}
			else{
				if($onlyFilled && (string)$child['fill'] === 'none'){
					continue;
				}
				if($childName === 'polygon'){
					$path .= ' '.$this->getPathFromPolygon($child);
				}
				elseif($childName === 'rect'){
					$path .= ' '.$this->getPathFromRect($child);
				}
				elseif($childName === 'circle'){
					$path .= ' '.$this->getPathFromCircle($child);
				}
				elseif($childName === 'ellipse'){
					$path .= ' '.$this->getPathFromEllipse($child);
				}
				elseif($childName === 'path'){
					$pathPart = trim($child['d']);
					if(substr($pathPart, 0, 1) === 'm'){
						$pathPart = 'M'.substr($pathPart, 1);
					}
					$path .= ' '.$pathPart;
				}
			}
		}

		return trim($path);

	}
returns one single SVG path definition for all elements in the specified element

@param  SimpleXMLElement $xmlElement group or svg element
@param  boolean          $onlyFilled ignore non filled objects
@return string                       SVG path definition