code: public function getTransformer()
  	{
  
  		if (!property_exists($this , 'transformer') ||  !$this->transformer )
  		{
  			if(!$this->_defaultTransformer )
  			{
  				$this->createQualifiedTransformerClass();
  			}
  			return $this->_defaultTransformer;
  		}
  
  		return $this->transformer;
  	}
docs: Gets the transformer class name
  
  @return mixed