code: def build(self, recipe, plugin=None):
          
          if recipe not in self.recipes.keys():
              raise RecipeMissingException("Recipe %s unknown." % recipe)
  
          recipe_obj = self.recipes[recipe]
  
          if plugin is not None:
              if recipe_obj.plugin != plugin:
                  raise RecipeWrongPluginException("The requested recipe does not belong to the given plugin. Use"
                                                   "the app object, to retrieve the requested recipe: "
                                                   "my_app.recipes.get(%s)" % recipe)
  
          recipe_obj.build()
docs: Execute a recipe and creates new folder and files.
  
          :param recipe: Name of the recipe
          :param plugin: Name of the plugin, to which the recipe must belong.