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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 render_check_and_set_platforms(self):
 """ If the check_and_set_platforms plugin is present, configure it """

        phase = 'prebuild_plugins'
        plugin = 'check_and_set_platforms'
        if not self.pt.has_plugin_conf(phase, plugin):
            return

        if self.user_params.koji_target.value:
            self.pt.set_plugin_arg(phase, plugin, "koji_target",
                                   self.user_params.koji_target.value)