{"op":"or","args":[{"op":"isNull","args":[{"property":"value"}]},{"op":"between","args":[{"property":"value"},10,20]}]}
value IS NULL OR value BETWEEN 10 AND 20
{"op":"or","args":[{"op":"isNull","args":[{"property":"value"}]},{"op":"between","args":[{"property":"value"},10.0,20.0]}]}