Nice to have -- create an empty Breeze Predicate

It would be nice if you could create an "empty" breeze predicate. Then if you were adding multiple conditions, you could easily do so in a loop.

For example, you might currently have to do something like this:

var predicate;

 entity1.child1.forEach(function (child) {

if (predicate) {

predicate = predicate.or('tableField', ops.Equals, child.keyColumn);

} else {

// create the original predicate

predicate = new breeze.Predicate('tableField', ops.Equals, child.keyColumn);

}

})

but it would be nicer if you could say:

var predicate = new breeze.Predicate();

entity1.child1.forEach(function (child) {

 predicate = predicate.or('tableField', ops.Equals, child.keyColumn);

}

})

where Breeze would assume that if the predicate was empty, it would simply add the first expression since there was nothing to OR it with. (or AND it with)