Constructor parameter to JsonFormatter given from xml

[Friendry]

Hello, How can I add the 'renderedMessage = true' in the appsettings file for the JsonFormatter? In the code it's easy, but I haven't managed to do this in the appsettings. Normally the 'renderedMessage' is given to the constructor of the JsonFormatter. Is there a way to do this in the in the xml?

The config part of the file looks like this:

<add key="serilog:using:File" value="Serilog.Sinks.File" />
<add key="serilog:write-to:File.path" value="Logs/Log_.txt" />
<add key="serilog:write-to:File.shared" value="true" />
<add key="serilog:write-to:File.rollingInterval" value="Day" />
<add key="serilog:write-to:File.formatter" value="Serilog.Formatting.Json.JsonFormatter" />