You can assert that a numeric value is within a given range using the optional IntegralRangeHandler.

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First, make sure to load the handler as it is not loaded by default.

cell handler loader
load	IntegralRangeHandler

Type the low end of the range, ".." and the high end and the cell will turn green if the actual value is within that range.

int fixture
field	field?	property	property?	set	get?
256	0..256	5	4..7	9	3..9
0	-12..37	-19	-256..0	-1	-12..12