ToJson:
FromJson:
This serializes the first Spread instance to a JSON object, and then deserializes that object into the second Spread instance.
FromJSON Options:
Ignore Formula
Ignore Style
Treat the frozen columns as row headers
Treat the frozen rows as column headers
Avoid recalculation after load
ToJSON Options:
Ignore Formula
Ignore Style
Treat the row headers as frozen columns
Treat the column headers as frozen rows