Filter is the Interface code which will accept or reject an object based on some criteria.
SearchFilter is a paricular kind of Filter where the code using the filter may choose do something other than retrieve all the objects sequentally and present them for acceptance.
A pea which defines the order to return the results of a search
PagingPosition models a current position in a paging display, with a first and last item value, 1 based.
Defines a restriction in a search, this is like saying: where userId = '123'; OR where userId like '%aaronz%';
This is a simple class which allows the passing of a set of search parameters in a nice way
Most searches can be modeled this way fairly easily.
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