/// <summary>
/// Reads context values from a message, sets current context to them, and returns a cookie to restore previous context
/// </summary>
public MessageContextCookie ReadContextsIntoCookie(UnsafeReader reader)
{
var numContextValues = reader.ReadShort();
Assertion.Assert(numContextValues <= myCounterpartHandlers.Count, "We know of {0} other side keys, received {1} instead", myCounterpartHandlers.Count, numContextValues);
for (var i = 0; i < numContextValues; i++)
{
myCounterpartHandlers[i].ReadValueAndPush(SerializationContext, reader);
}
return(new MessageContextCookie(this, numContextValues));
}