title: How to lookup element by key using flatbuffer's Object API
body: <p>Is it possible to lookup elements by key with the object API just like it's possible in the non-object API with the &quot;LookUpByKey&quot; method?</p>
  <p>I can't find any method that seems to do that.</p>
  <p>Am I supposed to implement a binary search by myself on the vector?</p>
  <p>Is the vector assumed to be already sorted?</p>