export type JSONContent = {
    type?: string;
    attrs?: Record<string, unknown>;
    content?: JSONContent[];
    marks?: {
        type?: string;
        attrs?: Record<string, unknown>;
        [key: string]: unknown;
    }[];
    text?: string;
    [key: string]: unknown;
};
export type SanitizeSchema = {
    nodes: Record<string, unknown>;
    marks: Record<string, unknown>;
};
export type SanitizeResult = {
    content: JSONContent;
    unknownNodeTypes: string[];
    unknownMarkTypes: string[];
};
/**
 * Removes node and mark types the schema doesn't define, so the document can be parsed instead of
 * throwing. An unknown leaf disappears, an unknown container is replaced by its children, an unknown
 * mark is dropped while its text stays. Never throws: stored JSON is untrusted.
 */
export declare function stripUnknownContent(content: JSONContent, schema: SanitizeSchema): SanitizeResult;