href="classnetdem_1_1_simulation.html#a918a87f02a78aed6a311bf90d1061e72">modifier_manager</a>.<a id="a31" name="a31"></a><a class="code hl_function" href="classnetdem_1_1_modifier_manager.html#a75ba1abedb33d45398052ada3177baa2">Enable</a>(grav.<a id="a32" name="a32"></a><a class="code hl_variable" href="classnetdem_1_1_modifier.html#a9ca96d4276e4cb637b0220ab6fbbbbee">label</a>);</div>
<div class="line"> </div>
<div class="line">  <span class="comment">// data dumper</span></div>
<div class="line">  <a id="_