PhpAmqpLib/Wire/GenericContent.php
public function has($name)
    {
        return isset($this->properties[$name]) || isset($this->delivery_info[$name]);
    }
public function has($name)
    {
        return isset($this->properties[$name]) || isset($this->delivery_info[$name]);
    }
public function has ( $ name ) { return isset ( $ this -> properties [ $ name ] ) || isset ( $ this -> delivery_info [ $ name ] ) ; }
Check whether a property exists in the 'properties' dictionary
or if present - in the 'delivery_info' dictionary.

@param string $name
@return bool
Check whether a property exists in the properties dictionary or if present - in the delivery_info dictionary .