code: @GET
      @Path("/classificationdef/guid/{guid}")
      @Produces(Servlets.JSON_MEDIA_TYPE)
      public AtlasClassificationDef getClassificationDefByGuid(@PathParam("guid") String guid) throws AtlasBaseException {
          AtlasClassificationDef ret = typeDefStore.getClassificationDefByGuid(guid);
  
          return ret;
      }
docs: Get the classification definition for the given guid
  @param guid classification guid
  @return classification definition
  @throws AtlasBaseException
  @HTTP 200 On successful lookup of the the classification definition by it's guid
  @HTTP 404 On Failed lookup for the given guid