question: return a predicate that will return true if the given attribute is not null and not empty . concode_field_sep PlaceHolder placeHolder concode_field_sep Predicate suffixes concode_elem_sep Predicate or concode_elem_sep Predicate prefix concode_elem_sep Predicate maxContentSize concode_elem_sep Predicate parse concode_elem_sep Predicate parse concode_elem_sep Predicate suffix concode_elem_sep Predicate secure concode_elem_sep Predicate minContentSize concode_elem_sep Predicate falsePredicate concode_elem_sep Predicate path concode_elem_sep Predicate not concode_elem_sep Predicate prefixes concode_elem_sep Predicate contains concode_elem_sep Predicate regex concode_elem_sep Predicate regex concode_elem_sep Predicate regex concode_elem_sep Predicate authRequired concode_elem_sep Predicate and concode_elem_sep Predicate paths concode_elem_sep Predicate equals concode_elem_sep Predicate truePredicate
target: Predicate function ( final ExchangeAttribute arg0 ) { return new ExistsPredicate ( arg0 ) ; }