Node Name: body
body children:
<h1>This is <b>bold</b> heading</h1>
<p>This is <u>underlined</u> paragraph</p>
****After adding new child node****
Node Name: body
body children:
<h1>This is <b>bold</b> heading</h1>
<p>This is <u>underlined</u> paragraph</p>
<p>This a new paragraph</p>