code: function loggableConstraints(constraints) {
  	var c = {
  		a: constraints.a,
  		b: constraints.b,
  		min: constraints.min,
  		max: constraints.max,
  		force: constraints.force,
  	};
  	if (constraints.constraintInfo) {
  		c.constraintInfo = {
  			onSOL: constraints.constraintInfo.onSOL,
  			sepType: constraints.constraintInfo.sepType,
  			nodeA: constraints.constraintInfo.nodeA.nodeName,
  			nodeB: constraints.constraintInfo.nodeB.nodeName,
  		};
  	}
  	return c;
  }
docs: Clean up the constraints object to prevent excessively verbose output
  and clog up log files / test runs.
  @private