name : advanced.xml
<?xml version="1.0" encoding="utf-8"?>
<form>
  <fields name="params">
    <fieldset name="advanced">
      <field name="module_tag" type="moduletag" label="COM_MODULES_FIELD_MODULE_TAG_LABEL" default="div" validate="options"/>
      <field name="bootstrap_size" type="integer" label="COM_MODULES_FIELD_BOOTSTRAP_SIZE_LABEL" first="0" last="12" step="1"/>
      <field name="header_tag" type="headertag" label="COM_MODULES_FIELD_HEADER_TAG_LABEL" default="h3" validate="options"/>
      <field name="header_class" type="textarea" label="COM_MODULES_FIELD_HEADER_CLASS_LABEL" rows="3" validate="CssIdentifier"/>
      <field name="style" type="chromestyle" label="COM_MODULES_FIELD_MODULE_STYLE_LABEL"/>
    </fieldset>
  </fields>
</form>

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