import { PackageSnapshots } from '@pnpm/lockfile-utils';
import { PreferredVersions } from '@pnpm/resolver-base';
import { DependencyManifest, ProjectManifest } from '@pnpm/types';
export declare function getAllUniqueSpecs(manifests: DependencyManifest[]): Record<string, string>;
export default function getPreferredVersionsFromPackage(pkg: Pick<ProjectManifest, 'devDependencies' | 'dependencies' | 'optionalDependencies'>): PreferredVersions;
export declare function getPreferredVersionsFromLockfile(snapshots: PackageSnapshots): PreferredVersions;