def METHOD_NAME(self, vns):
    self.platform.add_platform_command(_xdc_separator("Clock constraints"))
    #for clk, period in sorted(self.clocks.items(), key=lambda x: x[0].duid):
    #    platform.add_platform_command(
    #        "create_clock -period " + str(period) +
    #        " {clk}", clk=clk)
    pass #clock constraints not supported