The destination categories sum to the cohort and DfE publishes the cohort
total, so a lone suppressed cell is recoverable by subtraction. canAggregate,
canRenderPublishedAggregate and canRenderBar are what stop a consumer doing
that; toBarSegments throws rather than leaving a readable gap.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BvdDKvFFSZuMVDH5fEyTob
