Whether a feature carries a searchable field where readField looks for it — the root,
then properties. A KEY, not a value: a property present with null is carried. The
load-time field diagnostic judges searchable.fields with it, beside the reader it mirrors.
Parameters
feature: object
A feature, as the layer store holds it.
path: string
The field, as searchable.fields writes it — a dotted path.
Returns boolean
true when the path exists at the root or under properties.
Whether a feature carries a searchable field where readField looks for it — the root, then
properties. A KEY, not a value: a property present withnullis carried. The load-time field diagnostic judgessearchable.fieldswith it, beside the reader it mirrors.