How to set "Pay for Conversions" through the API?

[Dennis Koschig]

Hello, how can i manipulate the following setting "Bezahlen für" / "Pay for"  through the API?

Currently, Campaigns are created with "Pay for Clicks" but i want to change this to "Pay for Conversion" through GoogleAds API Code (php).

The Code currently looks like this:

    switch ($opt_target) {

      case FeedObj::OPT_TARGET_CLICKS:

        $bidding_strategy_configuration = new BiddingStrategyConfiguration();

        $bidding_strategy_configuration->setBiddingStrategyType(

          BiddingStrategyType::MANUAL_CPC

        );

        $bidding_scheme = new ManualCpcBiddingScheme();

        $bidding_strategy_configuration->setBiddingScheme($bidding_scheme);

        $campaign->setBiddingStrategyConfiguration($bidding_strategy_configuration);

        break;

      case FeedObj::OPT_TARGET_CONVERSIONS:

        //@todo: can we do something to select "pay for conversions" ?

        // Set bidding strategy: Target CPA

        $bidding_scheme = new TargetCpaBiddingScheme();

        $money = new Money();

        $money->setMicroAmount($mysterious_micro_amount);

        $bidding_scheme->setTargetCpa($money);

        $bidding_strategy_configuration = new BiddingStrategyConfiguration();

        $bidding_strategy_configuration->setBiddingScheme($bidding_scheme);

        $campaign->setBiddingStrategyConfiguration($bidding_strategy_configuration);

        break;

    }

How can i accomplish this? Which Objects/Attributes/Constants are needed to create Campaigns with "Pay for Conversions" instead of "Pay for Clicks"?