JavaScript Inspection: Errors for 'Unneeded comma' and 'Unused paramaters'

Hi!

I am searching in the settings where I can change the "level" for the inspection warnings mentioned above. Per default, they seems to be only warnings, I would like to get an error at this point. For example, the following code only raise warnings but I want errors:

function(unusedParam){
  return [1,2,3,];
}

In the inspection tab of the settings, these two inspection options aren't listed, where should I search for it?

Thx!