import { SdtMetadata } from './index.js';
type SdtBlockCandidate = {
    attrs?: {
        sdt?: SdtMetadata | null;
        containerSdt?: SdtMetadata | null;
    } | null;
};
export declare function isSdtContainerMetadata(sdt: SdtMetadata | null | undefined): boolean;
export declare function getSdtContainerMetadata(sdt?: SdtMetadata | null, containerSdt?: SdtMetadata | null): SdtMetadata | null;
export declare function getSdtContainerKey(sdt?: SdtMetadata | null, containerSdt?: SdtMetadata | null): string | null;
export declare function hasExplicitSdtContainerKey(sdt?: SdtMetadata | null, containerSdt?: SdtMetadata | null): boolean;
export declare function getSdtContainerKeyForBlock(block?: SdtBlockCandidate | null): string | null;
export {};
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