code: @InterfaceAudience.Public
      public boolean isDeleted() {
          try {
              return getCurrentRevision() == null && getLeafRevisions().size() > 0;
          } catch (CouchbaseLiteException e) {
              throw new RuntimeException(e);
          }
      }
docs: Is this document deleted? (That is, does its current revision have the '_deleted' property?)
  
  @return boolean to indicate whether deleted or not