
T - the data type of records in the listpublic static class ProvidesKey extends Object
Implementors of ProvidesKey provide a key for list items, such that
items that are to be treated as distinct (for example, for editing) have
distinct keys.
The key must implement a coherent set of Object#equals(Object) and
Object#hashCode() methods such that if objects A and B are to be treated as identical, then A.equals(B), B.equals(A), and A.hashCode() == B.hashCode(). If A and
B are to be treated as unequal, then it must be the case that A.equals(B) == false and B.equals(A) == false.
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