code: @Override
      public boolean remove(Object o) {
          Integer id = indexOf((Record) o);
          if(id == null) {
              return false;
          }
          remove(id);
          return true;
      }
docs: Removes the first occurrence of the specified element from this Dataframe,
  if it is present and it does not update the metadata.
  
  @param o
  @return