Is your feature request related to a problem? Please describe.
A server I have to work with does not accept the default SipMethod.UPDATE message type to keep a connection alive. Instead, my app is required to send new INVITE messages.

Describe the solution you'd like
It would be great when a new field SipMethod sessionTimersRefreshMethod would be added to UaSettings. That way, apps could still use the (very helpful) SipUaHelper class and adapt the refreshing method to what is required by servers.

Describe alternatives you've considered
The only alternatives I can think of are:

• Get the server to accept UPDATE messages. This is unlikely (third party implementation)
• Re-implement the SipUaHelper to directly write the Settings that I need. That would be quote cumbersome..