Cartalyst\Sentinel\Permissions\PermissibleTrait::updatePermission PHP Method

    public function updatePermission($permission, $value = true, $create = false)
    {
        if (array_key_exists($permission, $this->permissions)) {
            $permissions = $this->permissions;
            $permissions[$permission] = $value;
            $this->permissions = $permissions;
        } elseif ($create) {
            $this->addPermission($permission, $value);
        }
        return $this;
    }