def _fix_up(self, cls, code_name):
self._code_name = code_name<EOL>if self._name is None:<EOL><INDENT>self._name = code_name<EOL><DEDENT>
Internal helper called to tell the property its name.

        This is called by _fix_up_properties() which is called by
        MetaModel when finishing the construction of a Model subclass.
        The name passed in is the name of the class attribute to which the
        Property is assigned (a.k.a. the code name).  Note that this means
        that each Property instance must be assigned to (at most) one
        class attribute.  E.g. to declare three strings, you must call
        StringProperty() three times, you cannot write

          foo = bar = baz = StringProperty()