'Get a label for a method
@param code: the method code
@return: the label (lazyT), or None for unsupported methods'

@classmethod
def _get_method_label(cls, code):

    methods = cls.METHODS
    if (code is None):
        code = 'list'
    if (code in methods):
        return current.T(methods[code])
    else:
        return None
