OptionalpaymentContext: PaymentContext | nullResource /{merchantId}/refunds/{refundId}/cancel - Cancel refund
OptionalpaymentContext: PaymentContext | nullResource /{merchantId}/refunds/{refundId}/cancelapproval - Undo approve refund
OptionalpaymentContext: PaymentContext | nullResource /{merchantId}/refunds - Find refunds
Resource /{merchantId}/refunds/{refundId} - Get refund
OptionalpaymentContext: PaymentContext | null
Resource /{merchantId}/refunds/{refundId}/approve - Approve refund