Changes to Retrieve an existing checkout session

the response's body type changed from string to object for status 404

added the optional property error to the response with the 404 status

added the optional property errorType to the response with the 404 status

added the optional property status to the response with the 404 status

the response property payment/attachment/body became optional for the status 200

the response property payment/attachment/body/education_details/merchant_subtype became optional for the status 200

the response property payment/attachment/body/education_details/program became optional for the status 200

the response property payment/attachment/body/education_details/program/months_to_completion became optional for the status 200

the response property payment/attachment/body/education_details/program/payment_tenure_months became optional for the status 200

the response property payment/attachment/body/education_details/student_history became optional for the status 200

the response property payment/attachment/body/education_details/student_history/avg_overdue_duration_days became optional for the status 200

the response property payment/attachment/body/education_details/student_history/late_payments_count became optional for the status 200

the response property payment/attachment/body/flight_points_simple/destination became optional for the status 200

the response property payment/attachment/body/flight_points_simple/destination/air_code became optional for the status 200

the response property payment/attachment/body/flight_points_simple/destination/city_code became optional for the status 200

the response property payment/attachment/body/flight_points_simple/origin became optional for the status 200

the response property payment/attachment/body/flight_points_simple/origin/air_code became optional for the status 200

the response property payment/attachment/body/flight_points_simple/origin/city_code became optional for the status 200

the response property payment/attachment/body/flight_reservation_details/insurance became optional for the status 200

the response property payment/attachment/body/flight_reservation_details/itinerary became optional for the status 200

the response property payment/attachment/body/flight_reservation_details/passengers became optional for the status 200

the response property payment/attachment/body/hotel_reservation_details/hotel_itinerary became optional for the status 200

the response property payment/attachment/body/hotel_reservation_details/insurance became optional for the status 200

the response property payment/attachment/body/hotel_reservation_details/passengers became optional for the status 200

the response property payment/attachment/body/insurance_details/client became optional for the status 200

the response property payment/attachment/body/insurance_details/client/document_type became optional for the status 200

the response property payment/attachment/body/insurance_details/client/first_name became optional for the status 200

the response property payment/attachment/body/insurance_details/client/last_name became optional for the status 200

the response property payment/attachment/body/insurance_details/payment_history_simple/date_of_first_paid_purchase became optional for the status 200

the response property payment/attachment/body/insurance_details/payment_history_simple/date_of_last_paid_purchase became optional for the status 200

the response property payment/attachment/body/insurance_details/policy_details became optional for the status 200

the response property payment/attachment/body/insurance_details/policy_details/car_details/manufacturer became optional for the status 200

the response property payment/attachment/body/insurance_details/policy_details/car_details/model became optional for the status 200

the response property payment/attachment/body/insurance_details/policy_details/car_details/year became optional for the status 200

the response property payment/attachment/body/insurance_details/policy_details/insurance_end_dt became optional for the status 200

the response property payment/attachment/body/insurance_details/policy_details/insurance_start_dt became optional for the status 200

the response property payment/attachment/body/insurance_details/policy_details/insurance_type became optional for the status 200

the response property payment/attachment/body/insurance_details/policy_details/insured_amount became optional for the status 200

the response property payment/attachment/body/insurance_details/policy_details/travel_details/arrival_country became optional for the status 200

the response property payment/attachment/body/insurance_details/policy_details/travel_details/departure_country became optional for the status 200

the response property payment/attachment/body/marketplaces/seller_category became optional for the status 200

the response property payment/attachment/body/marketplaces/seller_commercial_registration_number became optional for the status 200

the response property payment/attachment/body/marketplaces/seller_id became optional for the status 200

the response property payment/attachment/body/marketplaces/seller_name became optional for the status 200

the response property payment/attachment/body/marketplaces/seller_phone became optional for the status 200

the response property payment/attachment/body/marketplaces/seller_registration_date became optional for the status 200

the response property payment/attachment/body/marketplaces/seller_website became optional for the status 200

the response property payment/attachment/content_type became optional for the status 200

added the optional property merchant to the response with the 200 status

the response's body type changed from string to object for status 500

added the optional property error to the response with the 500 status

added the optional property errorType to the response with the 500 status

added the optional property status to the response with the 500 status

removed the KWD enum value from the payment/currency response property for the response status 200