priority property
The priority for the rule within the pipeline.
This determines the order in which it will be matched. A higher priority will be registered earlier in the pipeline, and therefore will be checked for a match before later rules.
The default priority is zero.
Setting the priority allows explicit control over the order in which automatic registrations are added to a pipeline. But normally, setting the priority is not necessary, since the ordering of registrations by their pattern should produce the correct result.
Null if this is annotating a pipeline exception handler. When this is
annotating a server exception handler or raw server exception handler,
this value is set to either _serverHighLevel or _serverLowLevel,
respectively.
Implementation
final int? priority;