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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 _init_qualifier_decl(qualifier_decl, qual_repo):
 """ Initialize the flavors of a qualifier declaration if they are not already set. """

        assert qualifier_decl.name not in qual_repo
        if qualifier_decl.tosubclass is None:
            qualifier_decl.tosubclass = True
        if qualifier_decl.overridable is None:
            qualifier_decl.overridable = True
        if qualifier_decl.translatable is None:
            qualifier_decl.translatable = False