ComputedEqualsValue

How MobX should compare the previous and next computed value before notifying observers.

• 'struct' — structural comparison (comparer.structural).
• 'shallow' — shallow comparison (comparer.shallow).
• true — reference equality (comparer.default).
• false — skip the annotation (handled by the annotation.computed / annotation.observable helpers).
• A custom (a, b) => boolean is allowed by the type for parity with IComputedValueOptions.equals.