It seems like the custom report demo might be out of date? I get a lot of errors like this one "PHP Fatal error: Class 'wp_slimstat_view' not found in my_custom_report.php on line 25" wp_slimstat_view doesn't exist anywhere in the plugin except the demo. Hard to build a custom report based off the demo when some of it doesn't work.
I'm trying to use the dropdown menu filter in my query but I can't figure out how to since wp_slimstat_view::$filters_parsed doesn't work. Any ideas?