public static DERBitString getInstance(Object obj)
public static KeyUsage getInstance(Object obj)
    public static DERBitString getInstance(Object obj)    {        if (obj instanceof KeyUsage)        {            return (KeyUsage)obj;        }        if (obj instanceof X509Extension)        {            return new KeyUsage(DERBitString.getInstance(X509Extension.convertValueToObject((X509Extension)obj)));        }        return new KeyUsage(DERBitString.getInstance(obj));    }