Changes to GET /payment_methods/:payment_method_id

the response's body type changed from no type to object for status 200

api operation id PaymentMethods_retrieve was added

added SavePaymentMethod to the response body allOf list for the response status 200

removed subschema #2 from the response body allOf list for the response status 400

removed subschema #2 from the response body allOf list for the response status 401

removed subschema #2 from the response body allOf list for the response status 403

removed subschema #2 from the response body allOf list for the response status 404

removed subschema #2 from the response body allOf list for the response status 429

removed subschema #2 from the response body allOf list for the response status 500

removed response discriminator for the response status 200

removed SavePaymentMethodBankCard from the response body oneOf list for the response status 200

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

removed the error enum value from the allOf[#/components/schemas/Error]/type response property for the response status 400

removed the error enum value from the allOf[#/components/schemas/Error]/type response property for the response status 401

removed the error enum value from the allOf[#/components/schemas/Error]/type response property for the response status 403

removed the error enum value from the allOf[#/components/schemas/Error]/type response property for the response status 404

removed the error enum value from the allOf[#/components/schemas/Error]/type response property for the response status 429

removed the error enum value from the allOf[#/components/schemas/Error]/type response property for the response status 500