code: @Override
      public boolean remove(Object o) {
          IAtomContainer atomContainer = (IAtomContainer) o;
  
          // we should never have a null conformer
          if (atomContainer == null) return false;
  
          int index = indexOf(atomContainer);
          if (index >= 0) {
              remove(index);
              return true;
          }
          return false;
      }
docs: Remove the specified conformer.
  
  @param o The conformer to remove (should be castable to IAtomContainer)
  @return true if the specified conformer was present and removed, false if not found