fromURL static method
Creates an instance of fabric.Image from an URL string
@static
@param {String} url URL to create an image from
@param {Function} callback
Callback to invoke when image is created (newly created image is passed as a first argument). Second argument is a boolean indicating if an error occurred or not.
@param {Object} imgOptions
Options object
Implementation
external static Image fromURL(dynamic url,
[Function callback, dynamic imgOptions]);