question: public ConjunctionOfClauses extend ( Collection < Clause > additionalClauses ) { Set < Clause > extendedClauses = new LinkedHashSet < Clause > ( ) ; extendedClauses . addAll ( clauses ) ; extendedClauses . addAll ( additionalClauses ) ; ConjunctionOfClauses result = new ConjunctionOfClauses ( extendedClauses ) ; return result ; }
target:  Create a new conjunction of clauses by taking the clauses from the current conjunction and adding additional clauses to it.