Perl unit test: mockModule needs to mock returning an array of objects with a 'getType' method

I'm attempting to make a unit test for perl code to mock a service which returns an array containing objects which also need to be mocked because they have a method getType() which I need to mock.

So the code which processes the results of this service call looks something like this:

   foreach my $set (@{$serviceResults->getValue()}) {
      next unless ($set->getType() eq 'type');
      ...
   }

and I'm trying to mock the service like so:

my $service;
my $mockService = sub {
    my (%resultValues) = @_;
    $service = mockModule(
       'My::Service',
       getValue => createMockObject(
          # how to mock the getType method?
       )
    )
};

And then I create a mock like this:

$mockService->([
    {type=>'a', data=>[0, 5]},
    {type=>'b', data=>[2, 3]}]);

So how do I create the mock of the getType method on each hash object in the array? This array changes depending on the unit test, I can't use a fixed size array.