Nullable TTime type
TTimeNullable = record;
Clear
Sets the IsNull property to True
HasValue
The property returns False if the value is Null; otherwise, the property returns True.
IsNull
The property returns True if the value is Null; otherwise, the property returns False.
ToString
The method converts a value to string representation, so that it is suitable for display.
Value
The property returns a value if it is not Null.