/** A contiguous raw source slice delimited by a structural multiline backtick. */
export interface OpaqueEmbeddedSourceScan {
    readonly start: number;
    readonly sourceStart: number;
    readonly sourceEnd: number;
    readonly end: number;
    readonly closed: boolean;
    readonly openingLineBreak: boolean;
    readonly closingTailStart: number | null;
    readonly closingTailEnd: number | null;
}
/**
 * Scans an opaque multiline payload without knowing its language or owner.
 * The closing backtick must appear at `declarationIndentation`, alone except
 * for a tail accepted by its language owner. Content is never decoded,
 * dedented, or searched for language constructs.
 */
export declare function scanOpaqueEmbeddedSource(source: string, start: number, declarationIndentation: string, acceptsClosingTail: (tail: string) => boolean): OpaqueEmbeddedSourceScan;
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