question: this method returns labelssource instance , containing all labels derived from this iterator concode_field_sep AtomicLong documentPosition concode_elem_sep String labelTemplate concode_elem_sep LabelsSource generator concode_elem_sep LabelAwareIterator labelAwareIterator concode_elem_sep LabelsSource generator concode_elem_sep LabelAwareIterator backendIterator concode_field_sep LabelledDocument next concode_elem_sep boolean hasNextDocument concode_elem_sep BasicLabelAwareIterator build concode_elem_sep LabelledDocument nextDocument concode_elem_sep void reset concode_elem_sep boolean hasNext concode_elem_sep Builder setLabelTemplate concode_elem_sep void shutdown concode_elem_sep void remove concode_elem_sep Builder setLabelsSource
target: LabelsSource function ( ) { return generator ; }