question: public void add ( String feats ) { if ( feats == null ) return ; String key , value ; int idx ; for ( String feat : Splitter . splitPipes ( feats ) ) { idx = feat . indexOf ( DELIM_KEY_VALUE ) ; if ( idx > 0 ) { key = feat . substring ( 0 , idx ) ; value = feat . substring ( idx + 1 ) ; put ( key , value ) ; } } }
target:  Adds the specific features to this map.