restore.point: Sets a restore point
In restorepoint: Debugging with restore points

The function behaves different when called from a function or when called from the global environemnt. When called from a function, it makes a backup copy of all local objects and stores them internally under a key specified by name. When called from the global environment, it restores the previously stored objects by copying them into the global environment. See the package Vignette for an illustration of how this function can facilitate debugging.

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  restore.point(name, deep.copy = TRUE, force = FALSE,
    dots = eval(substitute(list(...), env = parent.frame())),
    use.restore.point.console = get.restore.point.options()$use.restore.point.console)

`name`	key under which the objects are stored. For restore points at the beginning of a function, I would suggest the name of that function.
`deep.copy`	if TRUE (default) try to make deep copies of objects that are by default copied by reference. Works so far for environments (recursivly) and data.tables. The function will search lists whether they contain reference objects, but for reasons of speed not yet in other containers. E.g. if an evironment is stored in a data.frame, only a shallow copy will be made. Setting deep.copy = FALSE may be useful if storing takes very long and variables that are copied by reference are not used or not modified.
`force`	store even if set.storing(FALSE) has been called