code: @Nonnull
    public final XMLWriterSettings setCharset (@Nonnull final Charset aCharset)
    {
      m_aCharset = ValueEnforcer.notNull (aCharset, "Charset");
      return this;
    }
docs: Set the serialization charset.
  
  @param aCharset
  The charset to be used. May not be <code>null</code>.
  @return this