Turn off a specific nosleep request or, if no handle is supplied, every
active request opened by the current R session.
Usage
nosleep_off(handle)
Value
Invisibly returns NULL.
Arguments
handle
Optional "NoSleepR_handle" object returned by
nosleep_on(). If omitted, all active nosleep handles created
in this session are turned off. Passing NULL is treated as a
no-op.