shouldRerender(newProps, newState) { // eslint-disable-line
    return true
  }
Determines if Component should be rendered again using `Component#rerender`
    after changing props. For comparisons, you can use `this.props` and
    `newProps`.

    The default implementation simply returns true.

    @param {Object} newProps The new props being applied to this component.
    @param {Object} newState The new state being applied
    @return a boolean indicating whether rerender() should be run.