/**
  * Set the number of iterations used by the contact solver.
  *
  * <p>The default is 10. Use 4 for low quality, 20 for high quality.
  *
  * @param numIterations The number of iterations used by the contact & constraint solver.
  */
 public void setSolverNumIterations(int numIterations) {
   this.solverNumIterations = numIterations;
   setSolverNumIterations(physicsSpaceId, numIterations);
 }