code: @Nonnull
    public FineUploader5Form setElementID (@Nonnull @Nonempty final String sElementID)
    {
      ValueEnforcer.notEmpty (sElementID, "ElementID");
      m_sFormElementID = sElementID;
      return this;
    }
docs: This can be the ID of the &lt;form&gt; or a reference to the &lt;form&gt;
  element.
  
  @param sElementID
  New value. May neither be <code>null</code> nor empty.
  @return this for chaining