Gives the result of adding or subtracting a core.time.Duration from this SysTime, as well as assigning the result to this SysTime.
The legal types of arithmetic for SysTime using this operator are
The core.time.Duration to add to or subtract from this SysTime.
See Implementation
Gives the result of adding or subtracting a core.time.Duration from this SysTime, as well as assigning the result to this SysTime.
The legal types of arithmetic for SysTime using this operator are