code: def collect(self):
          
          class_functions = []
          for key in self.__class__.__dict__.keys():
              func = self.__class__.__dict__[key]
              if (inspect.isfunction(func)):
                  class_functions.append(func)
  
          functions = sorted(class_functions, key=lambda func: func.__name__)
          for function in functions:
              value = function(self)
              if value:
                  return value
docs: Select the best suited data of all available in the subclasses.
              In each subclass, the functions alphabetical order should
              correspond to their importance.
              Here, the first non null value is returned.