fixes #25094, type params in static methods shouldn't always be an error

pkg/analyzer/lib/src/generated/error_verifier.dart

Index: pkg/analyzer/lib/src/generated/error_verifier.dart
diff --git a/pkg/analyzer/lib/src/generated/error_verifier.dart b/pkg/analyzer/lib/src/generated/error_verifier.dart
index 7e131d4fdd2eb80d172e742418f9de818c23d6f5..094b3e4b3ae5bf21a91ec67e384981f5dd6dd2dd 100644
--- a/pkg/analyzer/lib/src/generated/error_verifier.dart
+++ b/pkg/analyzer/lib/src/generated/error_verifier.dart
@@ -5238,9 +5238,14 @@ class ErrorVerifier extends RecursiveAstVisitor<Object> {
     if (_isInStaticMethod || _isInStaticVariableDeclaration) {
       DartType type = name.type;
       if (type is TypeParameterType) {
-        _errorReporter.reportErrorForNode(
-            StaticWarningCode.TYPE_PARAMETER_REFERENCED_BY_STATIC, name);
-        return true;
+        // The class's type parameters are not in scope for static methods.
+        // However all other type parameters are legal (e.g. the static method's
+        // type parameters, or a local function's type parameters).
+        if (type.element.enclosingElement is ClassElement) {
+          _errorReporter.reportErrorForNode(
+              StaticWarningCode.TYPE_PARAMETER_REFERENCED_BY_STATIC, name);
+          return true;
+        }
       }
     }
     return false;