public function addProperty($property, $content, $position = 100)
    {
        $attr = [
            'property' => $property,
            'content' => $content
        ];
        $this->add($attr, $position);
        return $this;
    }
public function addProperty($property, $content, $position = 100)
    {
        $attr = [
            'property' => $property,
            'content' => $content
        ];
        $this->add($attr, $position);
        return $this;
    }
public function addProperty ( $ property , $ content , $ position = 100 ) { $ attr = [ 'property' => $ property , 'content' => $ content ] ; $ this -> add ( $ attr , $ position ) ; return $ this ; }
add a property meta tag

eg: <meta property="foo" content="bar" />

@param string $property property name
@param string $content  property value
@param int    $position sort order

@return Metas

@access public
add a property meta tag