question: private String resolveSearchField ( IBindingSet bs ) { String searchFieldStr = resolveAsString ( searchField , bs ) ; if ( searchFieldStr == null || searchFieldStr . isEmpty ( ) ) { searchFieldStr = defaults . getDefaultSearchField ( ) ; } return searchFieldStr == null || searchFieldStr . isEmpty ( ) ? FTS . Options . DEFAULT_SEARCH_FIELD : searchFieldStr ; }
target:  Resolves the search field, which is either a constant or a variable to be looked up in the binding set.