A simple clock interface that gives you time.
A simple liveliness monitor with which clients can register, trust the component to monitor liveliness, get a call-back on expiry and then finally unregister.
Interface class to obtain process resource usage NOTE: This class should not be used by external users, but only by external developers to extend and include their own process-tree implementation, especially for platforms other than Linux and Windows.
Clock that gives the current time from the system
clock in milliseconds.
Clock that gives the current UTC time in
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