Repo.ProductDataInterface.php

<?php namespace App\Contracts;

interface ProductDataInterface
{
  /**
     * Sets the title of the product
     * @param string $title
     * @return $this
     */
    public function setTitle($title);
    
    /**
     * Sets the price of the product
     * @param float $price
     * @return $this
     */
    public function setPrice($price);
  
    /**
     * Saves the instance
     * @return bool
     */
    public function save();
}