Notice: Undefined variable: pagination in C:\xampp\htdocs\punto\Models\product.php on line 23

Fatal error: Call to a member function get_page() on null in C:\xampp\htdocs\punto\Models\product.php on line 23
 alguien me puede ayudar si alguien ha usado zebra que me ayude

function show_product(){
			include ('../libs/Zebra_Pagination.php');
			$sql = 'SELECT * FROM product limit 0,4'.(($pagination->get_page()-1)+$rec).'.'.$rec;
			$record = $this->conexion->conexion->query($sql);
			$item =0;
 
			$total->conexion->query('SELECT * FROM product ');
			//save total
			$total_record = mysqli_num_rows($total);
			//number of record to be displayed in screen
			$rec = 10;
			//zebra class
			$pagination = new Zebra_Pagination();
			//zebra functions
			$pagination->records($total_record);
			$pagination->records_per_page($rec);		
 
			if(!$this->conexion->conexion->query($sql)){
				printf("Errormessage: %s\n", $this->conexion->conexion->error);
			}
			if($record->num_rows>0){
				while($show = $record->fetch_array(MYSQLI_ASSOC)){
					$item += 1;
					echo '<tr>
								<td>'.$item.'</td>
								<td>'.$show["code"].'</td>
								<td>'.$show["product"].'</td>
								<td>'.$show["price"].'</td>
								<td>'.$show["stock"].'</td>
								<td><button class="btn btn-warning frm-action"><span class="glyphicon glyphicon-edit"><span<button><button class="btn btn-danger frm-action"><span class="glyphicon glyphicon-trash"><span<button></td>
						 </tr>';
				}
			}
			else{
					echo '<tr><td colspan="7">no hay registros</td></tr>';
			}
		}