Method getDirtySelectionRows

lib/selection-manager.ts:353–355

* Get dirty selection rows that need redraw (for clearing old highlight)

()

   * Get dirty selection rows that need redraw (for clearing old highlight)
   */
  getDirtySelectionRows(): Set<number> {
    return this.dirtySelectionRows;
  }

  /**
   * Clear the dirty selection rows tracking (after redraw)