- ExtensionMethodGroupExpr LookupExtensionMethod (Type extensionType, string name, Location loc);
- FullNamedExpression LookupNamespaceOrType (string name, Location loc, bool ignore_cs0104);
+ ExtensionMethodGroupExpr LookupExtensionMethod (TypeSpec extensionType, string name, int arity, Location loc);
+ FullNamedExpression LookupNamespaceOrType (string name, int arity, Location loc, bool ignore_cs0104);