meter bytes: The array of UInt8 to write.
- parameter dataPosition: The offset within <code>bytes</code> at which to begin writing.
- parameter length: The number of bytes to write.
- throws: <code>PerfectError.FileError</code></p>

                      </div>
                      <div class="declaration">
                        <h4>Declaration</h4>
                        <div class="language">
                          <p class="aside-title">Swift</p>
                          <pre class="highlight"><c