shouldHold

Check if this process should own the lease. For example, if a lease is first-come first-serve, then this process should try to own the lease, whereas a lease that uses consistent hashing should try to own if and only if it is assigned the lease.

Note that it is possible for a lease to be held by a process that is not supposed to own it, e.g. a process is holding the lease but a new process starts and is assigned the lease via consistent hashing.

This method should not attempt to acquire the lease, make network calls, or block.