GeoLeaf Core API - v3.19.0
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    What a provider is asked about: one layer, its definition, and the style it wears.

    interface DeclaredFieldsContext {
        layerId: string;
        def: Readonly<Record<string, unknown>>;
        style: Readonly<Record<string, unknown>> | null;
    }
    Index
    layerId: string

    The layer's identifier.

    def: Readonly<Record<string, unknown>>

    The layer's definition, as the loader holds it.

    style: Readonly<Record<string, unknown>> | null

    The style document the layer wears — null when it has none.