Can't use a cell instance as a Column's 'cell' attribute

[n0nick]

Although the Column documentation says about the cell attribute:

If this is a string, the capitalized form will be used to look up a cell class in Backbone, i.e.: string => StringCell. If a Cell subclass is supplied, it is initialized with a hash of parameters. If a Cell instance is supplied, it is used directly.

I can't get it to work when setting cell to be an instance of a Cell class, and indeed the failing line in the makeCell implementation seems to always want to call new on the given cell value:

  makeCell: function (column) {
    return new (column.get("cell"))({
      column: column,
      model: this.model
    });
  },

https://github.com/cloudflare/backgrid/blob/0.3.7/src/row.js#L77-L82

Am I missing something?