Esri/esri-leaflet — pull request #327 by oslek (2014-08-10 17:33:28+00:00)
Title: Change param name `key` to `url`

Change to match the `initialize` function, which uses param name `url`. Param name `key` is appropriate for the `basemapLayer` constructor, but `url` seems correct here. I will also submit pull for documentation update.