Problem/Motivation
Symfony services can have arrays as arguments that contain services that are wrapped in a memoizing closure.
Those arguments are then converted to \Symfony\Component\DependencyInjection\Argument\ServiceClosureArgument by the container builder.
They are not supported by \Drupal\Component\DependencyInjection\Dumper\OptimizedPhpArrayDumper::dumpValue().
Proposed resolution
Convert \Symfony\Component\DependencyInjection\Argument\ServiceClosureArgument to an array so we can dump it.
Remaining tasks
User interface changes
None
API changes
No change.
Data model changes
None