TypeError passing FormattableMarkup instead of string

I think string|\Stringable makes the most sense here.

I'm not sure about #4. PNX\Prometheus\Metric can't do anything special with Stringable objects we pass to it, so it makes sense to limit it to only primitive strings. What if instead we cast to string in \Drupal\prometheus_exporter\Plugin\BaseMetricsCollector::getDescription? That would mean the existing return type in \Drupal\prometheus_exporter\Plugin\MetricsCollectorInterface::getDescription is valid and we don't have to mess around with types in multiple places.

Moved to Prometheus Exporter queue since any Drupal solution would apply to more than just Prometheus Webform, and any library solution can be discussed there. Wonder what that will do with the existing issue fork.

mstrelan → changed the visibility of the branch 3473714-typeerror to hidden.

Both the label and description are usually FormattableMarkup objects, or sometimes strings. Let's leave the library to require strings and do the casting on the Drupal side.

Automatically closed - issue fixed for 2 weeks with no activity.