function Var() {
    this.gridRenderer = defaults.gridRenderer;
    this.rowHeaderCheckboxes = defaults.rowHeaderCheckboxes;
    this.rowHeaderNumbers = defaults.rowHeaderNumbers;
    this.gridBorder = defaults.gridBorder;
    this.gridBorderTop = defaults.gridBorderTop;
    this.gridBorderRight = defaults.gridBorderRight;
    this.gridBorderBottom = defaults.gridBorderBottom;
    this.gridBorderLeft = defaults.gridBorderLeft;
}
Creates an instance variable backer for use by the getters and setters described in {@link dynamicProperties}.
@constructor
@memberOf Hypergrid~
@private