code: @GET
      @Path("/{variantId}/installations/")
      @Produces(MediaType.APPLICATION_JSON)
      @GZIP
      public Response exportInstallations(@PathParam("variantId") String variantId) {
          return Response.ok(getSearch().findAllInstallationsByVariantForDeveloper(variantId, 0, Integer.MAX_VALUE, null).getResultList()).build();
      }
docs: Endpoint for exporting as JSON file device installations for a given variant.
  Only Keycloak authenticated can access it
  
  @param variantId the variant ID
  @return          list of {@link org.jboss.aerogear.unifiedpush.api.Installation}s