/**
 *
 * @param packageName
 */
export declare function hasVersionSpecifier(packageName: string): boolean;
/**
 *
 * @param packageNameAndVersion
 */
export declare function getVersionSpecifier(packageNameAndVersion: string): string | undefined;
/**
 * Returns only the package name from a string of the form [@scope/]package-name@version
 *
 * @param packageNameAndVersion
 */
export declare function getPackageName(packageNameAndVersion: string): string;
/**
 * Returns the latest version of an npm package
 *
 * @param packageName The npm package name
 * @param fallbackVersion The fallback version to return in case anything goes wrong. If this is set, no error is thrown.
 */
export declare function fetchPackageVersion(packageName: string, fallbackVersion?: string): Promise<string>;
/**
 * Returns the reference to the version of an npm package
 *
 * @param packageName The npm package name (may include a version specifier like `abc@1.2.3`)
 */
export declare function fetchPackageReferenceVersion(packageName: string): Promise<string>;