Atom filter used to specify whether two atoms are considered neighbors,
for the purpose of tabulating neighbor lists. Neighbors are indicated
if the AtomsetFilter.accept() method returns true. Adds neighbor management
methods to set the box where the criterion is being applied, and to
indicate if neighbor list for atom needs updating.
Specifies the box where the criterion is being applied. Sometimes
needed if the criterion depends on features of the box, such as the
Indicates whether the atom has changed (e.g. moved) by an amount
that might have caused its neighbor list to be invalid. If this
method returns true, a neighbor list failure may have introduced
errors in the calculation.