question: retrieve the contents of a node by key . concode_field_sep PlaceHolder placeHolder concode_field_sep Map<K,R> getItems concode_elem_sep void addNode concode_elem_sep void addNode concode_elem_sep boolean containsKey concode_elem_sep void unmarkAll concode_elem_sep R get
target: V function ( K arg0 ) { if ( ! getItems ( ) . containsKey ( arg0 ) ) return null ; return getItems ( ) . get ( arg0 ) . getItem ( ) ; }