Returns term frequency in the current document, or 1 if the field was indexed
Returns the next position, or -1 if positions were not indexed. Calling this
more than #freq() times
Returns end offset for the current position, or -1 if offsets were not indexed.
Returns start offset for the current position, or -1 if offsets were not
Returns the payload at this position, or null if no payload was indexed. You
should not modify anyth
Returns true if the given feature is requested in the flags, false otherwise.
Returns the related attributes.