title: Why does React Native not offer a justify-self
body: <p>I want to align an item in the primary axis. For example, I want to have a row with a few children all aligned left, and then one child aligned on the right side.</p>
  
  <p>You could achieve that effect with something like "position: absolute; right: 0", but I'm wondering if theres a better way. It seems like there ought to be a <code>justifySelf</code> property, that only affects one child and affects its alignment on the primary axis, in the same way the <code>alignSelf</code> affects one child's alignment on the secondary axis.</p>
  
  <p>Yet no such <code>justifySelf</code> seems to exist. Why is this?</p>
  
  <p>It's similar to this question but not quite: <a href="https://stackoverflow.com/questions/32030050/how-can-you-float-right-in-react-native">How can you float: right in React Native?</a></p>