Specifies how the message should be reported.
If the IExtractorInvokeOptions.messageCallback handles the message (i.e. sets
handled = true), it can use the
logLevel to determine how to display the message.
Alternatively, if API Extractor is handling the message, the
messageCallback could assign
logLevel to change how it will be processed. However, in general the recommended practice is to configure message routing using the
messages section in api-extractor.json.
To discard a message entirely, assign
logLevel = none.