import { SchematicContext, TaskId, Tree } from '@angular-devkit/schematics';
import { NodeDependency } from '@schematics/angular/utility/dependencies';
export declare function readPackageJson(tree: Tree): any;
export declare function dependencyExists(dependency: NodeDependency, packageJson: any): boolean;
export declare function createNodePackageInstallationTask(context: SchematicContext): TaskId;