import type { ContentDelta, Part, PartDelta } from "./types.ts";
/**
 * Because of the difference in mapping, especially in `OpenAI` cases,
 * where text and audio part does not have indexes
 * or in Google cases, where no parts have indexes,
 * we need to guess an index for the incoming delta
 * which is required in our unified interface.
 *
 * toolCallIndex does not always correspond to the index of the tool call in the deltas
 * because some providers keep tool call separate from other parts (e.g openai). We
 * can match this against the existing tool call deltas
 */
export declare function guessDeltaIndex(part: PartDelta, allContentDeltas: ContentDelta[], toolCallIndex?: number): number;
export declare function looselyConvertPartToPartDelta(part: Part): PartDelta;