[clang] [NFC][analyzer] Multipart checker refactor 2: NullabilityChecker (PR #132250)

[Donát Nagy via cfe-commits]

================
@@ -1403,6 +1403,16 @@ void NullabilityChecker::printState(raw_ostream &Out, ProgramStateRef State,
   }
 }
 
+// The checker group "nullability" consists of the checkers that are
+// implemented as the parts of the checker class `NullabilityChecker`. These
+// checkers share a checker option "nullability:NoDiagnoseCallsToSystemHeaders"
+// which semantically belongs to the whole group and not just one checker from
+// it. As this is a unique situation (I don't know about any other similar
+// group-level option) there is no mechanism to inject this group name from
+// e.g. Checkers.td, so I'm just hardcoding it here. (These are old stable
+// checkers, I don't think that their name will change.)
+#define CHECKER_GROUP_NAME "nullability"
----------------
NagyDonat wrote:

Yes, that's probably a better choice.

https://github.com/llvm/llvm-project/pull/132250