code: public void setUserIds(java.util.Collection<String> userIds) {
          if (userIds == null) {
              this.userIds = null;
              return;
          }
  
          this.userIds = new com.amazonaws.internal.SdkInternalList<String>(userIds);
      }
docs: <p>
  The account ID to modify for the snapshot.
  </p>
  
  @param userIds
  The account ID to modify for the snapshot.