code: @Nonnull
    public final XMLWriterSettings setIndent (@Nonnull final EXMLSerializeIndent eIndent)
    {
      m_eIndent = ValueEnforcer.notNull (eIndent, "Indent");
      return this;
    }
docs: Set the way how to indent/align
  
  @param eIndent
  Indent and align definition. May not be <code>null</code>.
  @return this