[UPROPERTY](Programming/UnrealArchitecture/Reference/Properties)(Config, EditAnywhere, Category="LiveLink|UI",
DisplayName="Time Without Frame to be Considered as Invalid", Meta=(ForceUnits=s))
double TimeWithoutFrameToBeConsiderAsInvalid
A source may still exist but does not send frames for a subject. Time before considering the subject as "invalid". The subject still exists and can still be evaluated. An invalid subject is shown as yellow in the LiveLink UI.