如何使用angular project运行ngast库？

我找到了angular的ngast库（），但不知道如何使用它。 说明书上说：

First you need connect the WorkspaceSymbols to the tsconfig.json root :

    import { join } from 'path';
    import { WorkspaceSymbols } from 'ngast';

    const config = join(process.cwd(), 'tsconfig.json');
    const workspace = new WorkspaceSymbols(config);
From there you can find all the decorated classes in your project :

    const modules = workspace.getAllModules();
    const components = workspace.getAllComponents();
    const directives = workspace.getAllDirectives();
    const injectables = workspace.getAllInjectable();
    const pipes = workspace.getAllPipes();

The first time one of the method above is called, ngast will run the analysis of the workspace.

The analysis is currently quite long: >10sec for a small project can go beyond 2min for a very large project.

但我不知道该把代码放在哪里，以及如何运行。有什么帮助吗？ 如果有帮助，示例项目：