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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def load_parameters(self, path_to_yaml_dir):
 """ Loads the legislation parameter for a directory containing YAML parameters files. :param path_to_yaml_dir: Absolute path towards the YAML parameter directory. Example: """


        parameters = ParameterNode('', directory_path = path_to_yaml_dir)

        if self.preprocess_parameters is not None:
            parameters = self.preprocess_parameters(parameters)

        self.parameters = parameters