_getAlignClassNames(align) {
    const {orientation} = this.props;
    const orientationClass = orientation
      ? `rv-hint--orientation-${orientation}`
      : '';
    return `${orientationClass} rv-hint--horizontalAlign-${align.horizontal}
     rv-hint--verticalAlign-${align.vertical}`;
  }
Get the class names from align values.
@param {Object} align object with horizontal and vertical prop strings.
@returns {string} Class names.
@private