code: function (body) {
        if (!body) { return; }
  
        var idx = bodies.indexOf(body);
        if (idx < 0) { return; }
  
        bodies.splice(idx, 1);
        if (bodies.length === 0) {
          bounds.reset();
        }
        return true;
      }
docs: Removes body from the system
  
  @param {ngraph.physics.primitives.Body} body to remove
  
  @returns {Boolean} true if body found and removed. falsy otherwise;