code: function prepare_items() {
  		$this->columns = array(
  			$this->get_columns(),
  			$this->get_hidden_columns(),
  			$this->get_sortable_columns()
  		);
  
  		$this->items = $this->get_items();
  
  		usort($this->example_data, array($this, 'usort_reorder'));
  
  		//paging
  		//$per_page = $this->get_items_per_page('books_per_page', 5);
  		//$current_page = $this->get_pagenum();
  	}
docs: Prepare table items.
  
  @since 0.2
  @return void