How to get type/initial value of parameters

Q: Why do I get type and initial value of parameters?

Example Perl code:

 #!/usr/bin/perl
 
 push(@INC,"../../../perlmain/install");
 require "Verific.pm";
 
 my $filename = "test.v";
 my $mode = 4; # SystemVerilog - Verilog 2K:  my $mode = 1;
 if (!Verific::veri_file::Analyze($filename, $mode)) { die "unable to analyze file $filename and mode $mode\n"; }
 
 $top_module_name = "top";
 
 # $top is VeriModule * 
 my $top = Verific::veri_file::GetModule($top_module_name);
 if (!defined($top)) { die "module $top_mod not found\n"; } 
 
 my $param_array = $top->GetParameters();
 if (!defined($param_array)) { print "*** no parameters found ***\n"; exit; }
 
 # now let's get an Array iterator instead of using the FOREACH_ARRAY_ITEM macro
 my $param_array_iter = $param_array->Iterator("VeriIdDef"); 
 
 for (my $param_id = $param_array_iter->First(); 
       $param_array_iter < $param_array_iter->Size(); 
       $param_id = $param_array_iter->Next()) {
 
       # null check param_id..
       if (!defined($param_id)) { next; }
      
       # print param name
       printf "* param name: %s ***\n", $param_id->Name();
 
       # print param type
       # $type, if specified, is VeriDataType *
       my $type = $param_id->GetDataType();
       if (defined($type)) {
           my $to_string = "";
           $type->PrettyPrint(\$to_string, 0);
           print "*** type: $to_string ***\n"; 
       } else {
           print "*** type not declared ***\n"; 
       }
 
       # $init_value is VeriExpression * 
       my $init_value = $param_id->GetInitialValue();
 
       if (defined($init_value)) {
          my $to_string = "";
          $init_value->PrettyPrint(\$to_string, 0);
          print "*** initial value: $to_string ***\n"; 
       }
 }
 
 exit;