>signal</code> to the process. This includes
Linux and OS X. The default signal is <a href="../../dart-io/ProcessSignal/sigterm-constant.html">ProcessSignal.sigterm</a>
which will normally terminate the process.</p>
<p>On platforms without signal support, including Windows, the call
just terminates the process in a platform specific way, and the
<code>signal</code> parameter is ignored.</p>
<p>Returns <code>true</code> if the signal is successfully delivered to the
process. Otherwise the signal could not be