public function get($key, $default_val = null)
    {
        $key = $this->normalizeKey($key);

        return parent::get($key, $default_val);
    }
public function get($key, $default_val = null)
    {
        $key = $this->normalizeKey($key);

        return parent::get($key, $default_val);
    }
public function get ( $ key , $ default_val = null ) { $ key = $ this -> normalizeKey ( $ key ) ; return parent :: get ( $ key , $ default_val ) ; }
Get a header

{@inheritdoc}

@see DataCollection::get()
@param string $key           The key of the header to return
@param mixed  $default_val   The default value of the header if it contains no value
@return mixed
Get a header