In order to merge two generators while using plop.js, we can create this helper function:

     plop.addHelper('mergeGenerator', (generator1, generator2) =>
   {

          plop.setGenerator(generator1 + ' + ' + generator2, {
              description: '',
              prompts: [].concat.apply([], [plop.getGenerator(gene
  rator1).prompts, plop.getGenerator(generator2).prompts]),
              actions: [].concat.apply([], [plop.getGenerator(gene
  rator1).actions, plop.getGenerator(generator2).actions])
          });

      });

And use it like this:

plop.getHelper('mergeGenerator').call(this, 'name_of_generator_1', 'name_of_generator_2');