Functional Interface:: This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@API(status=STABLE)
@FunctionalInterface
public interface QueryFilter

Method Summary

Modifier and Type	Method	Description
`java.lang.String`	`filter(java.lang.String query)`
`static QueryFilter`	`merge(QueryFilter left, QueryFilter right)`
`static QueryFilter`	`none()`

Interface QueryFilter