code()
code() : string
The stable dotted code every finding from this tripwire reports under.
Returns
string —For example "frame.digest_mismatch".
A delta frame's parent is gone, so the frame decodes to nothing.
Delta coding buys 63.7x on rewritten values by encoding each version against the one before it, and the cost is exactly this dependency. A prune that collects a parent because nothing references it directly breaks every frame downstream of it, which is why delta parents are the third class reachability protects.
check(array $observation) : \Drupal\strata\Health\Finding|null
Evaluates the check against one observation.
| array | $observation | Scalars the caller already had in hand. A tripwire reads from this and nothing else. |
A finding when the symptom is present, or NULL when the check is satisfied.