Return the forward rate at a given timeIndex and for a given liborIndex.
Parameters:
process - The discretization process generating this model. The process provides call backs for TimeDiscretization and allows calls to getProcessValue for timeIndices less or equal the given one.
Same as java.util.Arrays.binarySearch(liborPeriodDiscretization,time). Will return a negative value if the time is not found, but then -index-1 corresponds to the index of the smallest time greater than the given one.
Parameters:
time - The period start.
Returns:
The index corresponding to a given time (interpretation is start of period)