code: function unsubscribe(object, callback, context) {
      if (object && object[_emberMetalStreamsStream.IS_STREAM]) {
        object.unsubscribe(callback, context);
      }
    }
docs: /*
  A method of unsubscribing from a stream which is safe for use with a non-stream
  object. If a non-stream object is passed, the function does nothing.
  
  @private
  @for Ember.stream
  @function unsubscribe
  @param {Object|Stream} object Object or stream to potentially unsubscribe from.
  @param {Function} callback Function originally passed to `subscribe()`.
  @param {Object} [context] Object originally passed to `subscribe()`.