def base_type(self, value):
        """The base_type property.
        
        Args:
            value (string). the property value.
        """
        if value == self._defaults['baseType'] and 'baseType' in self._values:
            del self._values['baseType']
        else:
            self._values['baseType'] = value
The base_type property.
        
        Args:
            value (string). the property value.