# File lib/mongo/operation/insert/bulk_result.rb, line 39
        def initialize(replies, ids)
          @replies = [*replies] if replies
          if replies && replies.first && (doc = replies.first.documents.first)
            if errors = doc['writeErrors']
              # some documents were potentially inserted
              bad_indices = {}
              errors.map do |error|
                bad_indices[error['index']] = true
              end
              @inserted_ids = []
              ids.each_with_index do |id, index|
                if bad_indices[index].nil?
                  @inserted_ids << id
                end
              end
            # I don't know if acknowledged? check here is necessary,
            # as best as I can tell it doesn't hurt
            elsif acknowledged? && successful?
              # We have a reply and the reply is successful and the
              # reply has no writeErrors - everything got inserted
              @inserted_ids = ids
            else
              # We have a reply and the reply is not successful and
              # it has no writeErrors - nothing got inserted.
              # If something got inserted the reply will be not successful
              # but will have writeErrors
              @inserted_ids = []
            end
          else
            # I don't think we should ever get here but who knows,
            # make this behave as old drivers did
            @inserted_ids = ids
          end
        end