~~Title: How version check works~~
~~NOTRANS~~

The flutter application doesn't work without the backend server. This server has a specific version and also the flutter application has support for a specific server version. If version is not supported, a message is shown in the flutter application.

**How does the version check work?**

The flutter application sends the supported version to the server and the server checks with its own version number. 

Following rules:
(1.0.0  = Major.Minor.Build)

|Client|Server|Status|
|2.0.0|3.0.0|Error|
|2.1.0|2.0.0|Error|
|
|2.1.0|2.1.1|OK|
|2.1.0|2.2.0|OK|
|2.1.1|2.1.0|OK|

Details: https://github.com/sibvisions/flutter_jvx/issues/49