import { SvamlCommand } from '../svaml-commands';
import { SvamlCommands } from './commands';
import type { CommandsSequenceCreator } from './command-sequence';
export type SequenceCallback = (sequence: CommandsSequenceCreator) => void;
/**
 * Commands for a nested handler.
 * A callback fills a sequence. One command, such as `Calls.hangup`, is stored
 * as a one-element list. An array is stored as given.
 */
export type CommandInput = SequenceCallback | SvamlCommands;
export declare function trackSequence(sequence: CommandsSequenceCreator, commands: SvamlCommand[]): void;
export declare function collectCommands(build: SequenceCallback): SvamlCommand[];
export declare function resolveCommands(input: CommandInput): SvamlCommand[];
export declare function appendCommands(current: SvamlCommand[] | undefined, input: CommandInput): SvamlCommand[];
/**
 * A `gotoMenu` target must be an item of the menu that contains it.
 * `startMenu` must be one of that menu's item names.
 */
export declare function assertMenuReferences(commands: SvamlCommand[], menuNames: ReadonlySet<string> | undefined): void;