l = 0 {
  if (initialCapacity == null || initialCapacity &lt; _INITIAL_CAPACITY) {
    initialCapacity = _INITIAL_CAPACITY;
  } else if (!_isPowerOf2(initialCapacity)) {
    initialCapacity = _nextPowerOf2(initialCapacity);
  }
  assert(_isPowerOf2(initialCapacity));
  _table = new List&lt;E&gt;(initialCapacity);
}</code></pre>
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