code: @Override
    public void setProp(String key, Object value) {
      super.setProp(key, value);
      for (WorkUnit workUnit : this.workUnits) {
        workUnit.setProp(key, value);
      }
    }
docs: Set the specified key, value pair in this {@link MultiWorkUnit} as well as in all the inner {@link WorkUnit}s.
  
  {@inheritDoc}
  @see org.apache.gobblin.configuration.State#setProp(java.lang.String, java.lang.Object)