docs: public ModifyDocumentPermissionRequest withAccountIdsToAdd(String... accountIdsToAdd) {
          if (this.accountIdsToAdd == null) {
              setAccountIdsToAdd(new com.amazonaws.internal.SdkInternalList<String>(accountIdsToAdd.length));
          }
          for (String ele : accountIdsToAdd) {
              this.accountIdsToAdd.add(ele);
          }
          return this;
      }