docs: public CreateVolumePermissionModifications withAdd(CreateVolumePermission... add) {
          if (this.add == null) {
              setAdd(new com.amazonaws.internal.SdkInternalList<CreateVolumePermission>(add.length));
          }
          for (CreateVolumePermission ele : add) {
              this.add.add(ele);
          }
          return this;
      }