title: What is the use of asterisk (*) type in Flow and what is the equivalent of that in TypeScript?
body: <p>First of all, I am mostly familiar with TypeScript. Flow looks very similar to TS in many ways, but I recently stumbled upon an asterisk (*) type. At first, I thought it was a synonym for "any", but now, after reading some of the release notes for Flow, I see that it's not. I skimmed through all the official docs and was not able to find any usage of "*".</p>
  
  <p>So, what is it and when to use it? But also, what would be a direct equivalent of that in TypeScript?</p>