title: What is a Node Handle?
body: <p>During a random documentation check on <code>cppreference.com</code> i noticed new member function overloads for some containers taking as a parameter what happens to be a new standard type from <code>C++17</code> called a <code>Node Handle</code>.</p>
  
  <p>Now <a href="http://en.cppreference.com/w/cpp/container/node_handle" rel="nofollow noreferrer">the documentation page of node handles on the same site</a> gives multiple details and technical behaviors on how this work, but it doesn't really convey properly the general idea and purpose of this new type.</p>
  
  <p>Hence the question, what is a Node Handle ?</p>