function fetchBlobCallback(blob, err) {
        if (err && $.console) console.log(err) // eslint-disable-line no-console
        if (blob && isInstanceOf('Blob', blob)) {
          file = blob // eslint-disable-line no-param-reassign
          url = createObjectURL(file)
        } else {
          url = file
          if (options && options.crossOrigin) {
            img.crossOrigin = options.crossOrigin
          }
        }
        img.src = url
      }
Callback for the fetchBlob call.

@param {Blob} blob Blob object
@param {Error} err Error object