@Override
  public PsiFunctionalExpression @NotNull [] findFunExpressionsInFile(SearchId @NotNull [] funExpressions,
                                                                      @NotNull PsiFileWithStubSupport file) {
    IntSet requiredIndices = new IntOpenHashSet(funExpressions.length);
    for (SearchId funExpr : funExpressions) {
      requiredIndices.add(funExpr.getId());
    }
    return JavaCompilerElementRetriever.retrieveFunExpressionsByIndices(requiredIndices, file);
  }
@Override
  public PsiFunctionalExpression @NotNull [] findFunExpressionsInFile(SearchId @NotNull [] funExpressions,
                                                                      @NotNull PsiFileWithStubSupport file)