title: Changing a parameter while branching in SCIP
body: <p>I use pyscipopt. I know how to add constraints while branching using handlers (kind of), but now I also want to change some parameters. I imagine that is similar, but couldn’t found an example.</p>
  <p>What I want is as follows: -Every time a feasible node is found (or every 10 nodes for example) update a parameter.</p>
  <p>How do I do this? Are there examples or documentation on this?</p>