/// <summary>
/// Get if this policy allows all traffic.
/// </summary>
/// <param name="policy">policy.</param>
/// <returns>if it is an allow-all policy.</returns>
public static bool GetAllowAll(this Zen <Policy> policy)
{
var labelKeys = policy.GetAllowKeys().Length();
var nsKeys = policy.GetAllowNSKeys().Length();
var denyAll = policy.GetDenyAll();
return(labelKeys.EqualToNumber(0) && nsKeys.EqualToNumber(0) && denyAll.Equals(False()));
}