Wraps a function with a transaction/span and finishes the span after the function is done. The created span is the active span and will be used as parent by other spans created inside the function and can be accessed via Sentry.getSpan(), as long as the function is executed while the scope is active.

If you want to create a span that is not set as active, use startInactiveSpan.

Note that if you have not enabled tracing extensions via addTracingExtensions or you didn't set tracesSampleRate, this function will not generate spans and the span returned from the callback will be undefined.