/**
* return the parsed value of the extension represented by the object identifier
* passed in.
*
* @return the parsed value of the extension if it's present, null otherwise.
*/
public Asn1Encodable GetExtensionParsedValue(DerObjectIdentifier oid)
{
X509Extension ext = GetExtension(oid);
return(ext == null ? null : ext.GetParsedValue());
}