code: def get_functions_writing_to_variable(self, variable):
          '''
              Return the functions writting the variable
          '''
          return [f for f in self.functions if f.is_writing(variable)f get_functions_writing_to_variable(self, variable):
          '''
              Return the functions writting the variable
          '''
          return [f for f in self.functions if f.is_writing(variable)]
docs: Return the functions writting the variable