问使用私有类型记录时出错？

EN

// BasePlugin.ts
export abstract class Base {
    protected abstract readonly commands: string[];
}


// Loader.ts

export const plugins: Base[] = [...] // A lot of plugins that extend Base that are already instantiated


// Help.ts
import { plugins } from './Loader'
export default class Help extends Base {
    commands = [
        '$help => sends this message'
    ];

    getAllHelp(): void {
        plugins.forEach(plugin => {
            plugin.commands.forEach(command => {
                ...
            )};
        )};
        ...
    }
}

[ts] Property 'commands' is protected and only accessible through an 
instance of class 'Help'.