code: @Override
      public void setParameters(Object[] params) throws CDKException {
          if (params.length > 1) {
              throw new CDKException("DistanceToAtomDescriptor only expects two parameters");
          }
          if (!(params[0] instanceof Integer)) {
              throw new CDKException("The parameter must be of type Integer");
          }
          focusPosition = (Integer) params[0];
      }
docs: Sets the parameters attribute of the DistanceToAtomDescriptor object
  
  @param  params            The parameter is the position to focus
  @exception  CDKException  Description of the Exception