/**
 * Whitelist metrics JSON to match `com.aware.agents.MetricsPayload` in `agents.proto`
 * before POSTing to `/smart-test/analyze_explorechimp_data_sources`. Java protobuf JSON
 * merge rejects unknown field names (e.g. historical `layoutShiftEntries`).
 */
/**
 * Returns a new object containing only fields defined on `MetricsPayload` and nested
 * messages (`LongTaskDetail`, `InteractionLatencyEntry`, `BoundingBox`, `ResourceTimingEntry`).
 */
export declare function sanitizeMetricsPayloadForProto(raw: Record<string, unknown>): Record<string, unknown>;
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