%Error: t/t_class_extends_nf_bad.v:15:19: Class for 'extends' not found: 'IsNotFound'
                                        : ... Suggested alternative: 'IsFound'
   15 | class Cls extends IsNotFound;   
      |                   ^~~~~~~~~~
%Error: t/t_class_extends_nf_bad.v:18:25: Class for 'extends' not found: 'NotFound2'
                                        : ... Suggested alternative: 'otFound2'
   18 | class Cls2 extends Pkg::NotFound2;   
      |                         ^~~~~~~~~
%Error: Exiting due to