<?php
/**
 * Owning Side
 *
 * @ManyToMany(targetEntity="Group", inversedBy="features")
 * @JoinTable(name="user_groups",
 *      joinColumns={@JoinColumn(name="user_id", referencedColumnName="id")},
 *      inverseJoinColumns={@JoinColumn(name="group_id", referencedColumnName="id")}
 *      )
 */
private $groups;

/**
 * Inverse Side
 *
 * @ManyToMany(targetEntity="User", mappedBy="groups")
 */
private $features;