var Permissions = function(ops){
	var base = this
	base.keys = _.keys(ops)
	base.keys.forEach(function(op){
		base[op] = ops[op]
	})
}

Permissions.prototype.toggle = function (key) {	
	var base = this
	var state = ! base[key]
	base.keys.forEach(function(op){
		base[op] = op == key ? state : false
	})
	return state
}