question: the index the document was fetched from . concode_field_sep XContentBuilderString FIELDS concode_elem_sep Map<String,Object> sourceAsMap concode_elem_sep XContentBuilderString EXISTS concode_elem_sep XContentBuilderString _TYPE concode_elem_sep String index concode_elem_sep byte[] sourceAsBytes concode_elem_sep BytesHolder source concode_elem_sep String type concode_elem_sep long version concode_elem_sep XContentBuilderString _VERSION concode_elem_sep XContentBuilderString _ID concode_elem_sep boolean exists concode_elem_sep String id concode_elem_sep Map<String,GetField> fields concode_elem_sep XContentBuilderString _INDEX concode_field_sep long getVersion concode_elem_sep Map<String,Object> sourceAsMap concode_elem_sep GetResult readGetResult concode_elem_sep void readFrom concode_elem_sep String index concode_elem_sep String getId concode_elem_sep byte[] source concode_elem_sep String type concode_elem_sep long version concode_elem_sep String sourceAsString concode_elem_sep void writeTo concode_elem_sep Iterator<GetField> iterator concode_elem_sep Map<String,GetField> getFields concode_elem_sep boolean isExists concode_elem_sep GetField field concode_elem_sep String getType concode_elem_sep Map<String,Object> getSource concode_elem_sep XContentBuilder toXContent concode_elem_sep boolean exists concode_elem_sep String id concode_elem_sep BytesHolder sourceRef concode_elem_sep Map<String,GetField> fields concode_elem_sep boolean isSourceEmpty
target: String function ( ) { return index ; }