import { Observable } from 'rxjs';
import { PreviewValue } from '@sanity/types';
import type { ApiConfig, Path, PrepareViewOptions } from './types';
import { Previewable, PreviewableType } from './types';
export interface PreparedSnapshot {
    type?: PreviewableType;
    snapshot: undefined | PreviewValue;
}
export declare function isRecord(value: unknown): value is Record<string, unknown>;
export declare function isReference(value: unknown): value is {
    _ref: string;
};
export declare function createPreviewObserver(observePaths: (value: Previewable, paths: Path[], apiConfig?: ApiConfig) => any): (value: Previewable, type: PreviewableType, viewOptions?: PrepareViewOptions, apiConfig?: ApiConfig) => Observable<PreparedSnapshot>;
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