import { Tree } from '@angular-devkit/schematics';
/**
 * Return the version of the given package json path
 * @param packageJsonPath
 */
export declare function getPackageVersion(packageJsonPath: string): string | undefined;
/**
 * Find the closest package.json file in parent folders
 * Note: It is using file system if no tree provided
 * @param currentPath current path to inspect
 * @param tree current path to inspect
 */
export declare const findClosestPackageJson: (currentPath: string, tree?: Tree) => string | undefined;
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