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Key_Bond__Payment_Delay

Key Payment Delay in Bond refers to the time interval between each accrual period end and the date when the respective coupon is paid.
By "accrual period end" is meant the last date in the respective period generated by the entry in
Key Bond::Accrual Schedule
Currently QuantLib allows only zero calendar days here.
Effectively this entry is only used to define the DateBump and Calendar conventions that apply in the payment date derivation out of a given accrual period end date.
Expects an object of type
Single Period