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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 normalize_name(self, name):
 """ Normalize a field or level name. :param name: The field or level name (a string). :returns: The normalized name (a string). Transforms all strings to lowercase and resolves level name aliases (refer to :func:`find_level_aliases()`) to their canonical name: | DEBUG | debug | | INFO | info | | WARN | warning | | WARNING | warning | | ERROR | error | | FATAL | critical | | CRITICAL | critical | """

        name = name.lower()
        if name in self.aliases:
            name = self.aliases[name]
        return name