lying execution engine basically executes a series of stateful transformations
on batches of data. The difficulty here is how much of that underlying API to expose here so it's still useful without the user having to understand 
how the Quokka runtime works. To that end, we have to come up with suitable partitioner and placement strategy abstraction classes and interfaces.</p>
<p>If you are interested in helping us hammer out this API, please talke to me: zihengw@stanford.edu.</p>

  <p><strong>Parameters:<