text: export default class VerticalLayoutData
  {
      constructor( percentWidth = NaN, percentHeight = NaN )
      {
          this._percentWidth = percentWidth;
          this._percentHeight = percentHeight;
      }
      set percentWidth( value )
      {
          if( this._percentWidth !== value )
          {
              this._percentWidth = value;
          }
      }
      get percentWidth()
      {
          return this._percentWidth;
      }
      set percentHeight( value )
      {
          if( this._percentHeight !== value )
          {
              this._percentHeight = value;
          }
      }
      get percentHeight()
      {
          return this._percentHeight;
      }
  }