question: returns the docvalues generation of this field , or -1 if no docvalues updates exist for it . concode_field_sep DocValuesType docValuesType concode_elem_sep int number concode_elem_sep boolean omitNorms concode_elem_sep int pointDimensionCount concode_elem_sep int pointNumBytes concode_elem_sep IndexOptions indexOptions concode_elem_sep boolean storePayloads concode_elem_sep String name concode_elem_sep long dvGen concode_elem_sep Map<String,String> attributes concode_elem_sep boolean storeTermVector concode_field_sep void setPointDimensions concode_elem_sep void setOmitsNorms concode_elem_sep boolean checkConsistency concode_elem_sep void update concode_elem_sep boolean hasPayloads concode_elem_sep boolean omitsNorms concode_elem_sep void setStorePayloads concode_elem_sep boolean hasNorms concode_elem_sep DocValuesType getDocValuesType concode_elem_sep boolean hasVectors concode_elem_sep IndexOptions getIndexOptions concode_elem_sep String putAttribute concode_elem_sep String getAttribute concode_elem_sep void setDocValuesGen concode_elem_sep void setDocValuesType concode_elem_sep void setIndexOptions concode_elem_sep int getPointDimensionCount concode_elem_sep int getPointNumBytes concode_elem_sep Map<String,String> attributes concode_elem_sep void setStoreTermVectors
target: long function ( ) { return dvGen ; }