Collator now iterates over self._data.items instead of self.items
Collator now iterates over self._data.items instead of self.items

vascotenner/holoviews,basnijholt/holoviews,ioam/holoviews,ioam/holoviews,vascotenner/holoviews,mjabri/holoviews,ioam/holoviews,vascotenner/holoviews,mjabri/holoviews,mjabri/holoviews,basnijholt/holoviews,basnijholt/holoviews