ile. For PEM files,
<code>password</code> is ignored. Assuming it is well-formatted, all
other contents of <code>file</code> are ignored.</p>
<p>NB: This function calls <a href="dart-io/File/readAsBytesSync.html">File.readAsBytesSync</a>, and will block on file IO.
Prefer using <a href="dart-io/SecurityContext/useCertificateChainBytes.html">useCertificateChainBytes</a>.</p>
<p>iOS note: As noted above, <a href="dart-io/SecurityContext/usePrivateKey.html">usePrivateKey</a> does the job of both
that call and 