import type { SignatureHelp } from '../types.js';
/**
 * Return AMPscript signature help for the given function context.
 * @param context - Parsed function call context.
 * @param context.functionName - Name of the function being called.
 * @param context.paramIndex - Zero-based index of the active parameter.
 * @param context.argValues - Top-level argument strings typed so far (for repeat-count lookup).
 * @returns SignatureHelp object, or null if the function is unknown.
 */
export declare function getAmpscriptSignatureHelp(context: {
    functionName: string;
    paramIndex: number;
    argValues?: string[];
}): SignatureHelp | null;
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