Combines the underlying history data from two representations.
combineHistry(x, y, before = FALSE)# S4 method for HistoryData
combineHistry(x, y, before = FALSE)
# S4 method for VirtHistoryTracker
combineHistry(x, y, before = FALSE)
An object representing captured history
An object representing captured history
logical. Should the data from y be placed before the
data from x in the combined history. Defaults to FALSE
The same class of object as x
. I.e., if x is a
HistoryTracker object, a HistoryTracker (of the same subclass)
is returned. If X is a HistoryData
object, that class
of object is returned.