he token-separated value list) exists.

 Each single non-string header value is converted to String using a <a href="../ext/RuntimeDelegate.HeaderDelegate.html" title="interface in jakarta.ws.rs.ext"><code>RuntimeDelegate.HeaderDelegate</code></a> if one
 is available via <a href="../ext/RuntimeDelegate.html#createHeaderDelegate(java.lang.Class)"><code>RuntimeDelegate.createHeaderDelegate(java.lang.Class)</code></a> for the header value
 class or using its <code>toString</code> method if a header delegate i