the current state of the contact model to a JSON object and returns it as the result value.</p>
<dl class="section return"><dt>Returns</dt><dd>A JSON object containing serialization data for this contact model. </dd></dl>

<p>Reimplemented in <a class="el" href="classnetdem_1_1_hertz_mindlin.html#a124e89ad6e3ba38671a922d2f5b86baa">netdem::HertzMindlin</a>, <a class="el" href="classnetdem_1_1_linear_spring.html#a8e3f2351614ca70c5ae23532494a8e37">netdem::LinearSpring</a>, <a class="el" href="classnetdem_1_1_p