MessagesPanelTag extends RequestContextAwareTag { TagWriter createTagWriter() { TagWriter tagWriter = new TagWriter(this.pageContext); return tagWriter; }  void setMessagesAttributeName(String messagesAttributeName); void setPanelClassName(String panelClassName); void setPanelTypeClassPrefix(String panelTypeClassPrefix); void setPanelElement(String panelElement); void setOuterElement(String outerElement); void setInnerElement(String innerElement); void setMessagesType(String messagesType); void setDisableHtmlEscape(
            String disableHtmlEscape);  }
@Test public void testCreateTagWriter() { MessagesPanelTag tag = new MessagesPanelTag(); tag.setPageContext(pageContext); assertThat(tag.createTagWriter(), is(notNullValue())); }