Javadoc
Returns a
Set view of the contexts contained in this model. The set is backed by the model, so
changes to the model are reflected in the set, and vice-versa. If the model is modified while an
iteration over the set is in progress (except through the iterator's own
remove operation), the
results of the iteration are undefined. The set supports element removal, which removes all statements
from the model for which that element is a context value, via the
Iterator.remove,
Set.remove,
removeAll,
retainAll, and
clear operations. It does not
support the
add or
addAll operations if the parameters
subj ,
pred or
obj are null.