Allows you to set up several events that roll up into a single metric.

• Copy the projectjs.min.js content and add it to your Project Javascript
• Copy the extension.json content and create a new Custom Analytics Extension
• Create a new Custom Event which will serve as the composite metric, e.g. performed_all_actions. When a visitor converts on the other events making up the composite event, a custom event using this api_name will be sent to Optimizely.

• Visit Integrations tab on an experiment
• Check the "Tracked" checkbox to enable
• Input settings as described in the section below.

• Composite Metric API Name - Indicate the api_name of the Custom Event that you created in the third step during installation.
• Event List - A comma-separate list of api_names that all need to be converted on to result in a conversion of the composite metric.

Turn on logging by setting a localStorage flag localStorage.setItem('__optCompositeTrackerDebug', 1)