question: search the item with the given path . concode_field_sep Map<String,OPFItem> itemsById concode_elem_sep Map<String,OPFItem> itemsByPath concode_elem_sep List<OPFItem> spine concode_elem_sep List<OPFItem> items concode_field_sep List<OPFItem> getItems concode_elem_sep OPFItems build concode_elem_sep Optional<OPFItem> getItemById concode_elem_sep List<OPFItem> getSpineItems
target: Optional < OPFItem > function ( String arg0 ) { return Optional . fromNullable ( itemsByPath . get ( arg0 ) ) ; }