code: function SKBlob (data) {
    var self = this
    if (!(self instanceof SKBlob)) return new SKBlob(data)
  
    if (!(data instanceof Buffer)) {
      data = new Buffer(data)
    }
  
    self._data = data
    self._type = fileType(data)
  
    self._isImage = BufferUtils.isImage(data)
    self._isMPEG4 = BufferUtils.isMPEG4(data)
    self._isVideo = self._isMPEG4
    self._isMedia = BufferUtils.isMedia(data)
  
    // TODO
    self._overlay = null
  }
docs: Snapchat Blob wrapper
  
  @class
  @param {Buffer} data