}
        return ot;
    }

    String getVirtualHostHeaders();

    default String getVirtualHostHeaderValue() {
        final String value = getVirtualHostValue();
        if (StringUtil.isNotBlank(value)) {
            return value;
        }
        return getVirtualHostHeaders();
    }

    @SuppressWarnings("unchecked")

     * The value is, e.g.  <br>
     * comment: Virtual Host: Host:fess.codelibs.org=fess
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getVirtualHostHeaders();

    /**
     * Get the value for the key 'virtual.host.headers' as {@link Integer}. <br>
     * The value is, e.g.  <br>
     * comment: Virtual Host: Host:fess.codelibs.org=fess