/// <reference types="node" />
import SourceMap from './SourceMap';
/**
 * Initializes a sourcemap for the file.
 * @param name - The name to use in the sourcemap.
 * @param options - Options for the sourcemap.
 * @example
 * // code from a vinyl object
 * initSourcemap(vinyl.relative, vinyl.contents)
 * // code from a string
 * initSourcemap(null, 'this is some code')
 */
export default function initSourcemap(name: string | null, contents: Buffer | string): SourceMap;