discourse/app/assets/javascripts/admin/adapters/build-plugin.js.es6

import RestAdapter from 'discourse/adapters/rest';

export default function buildPluginAdapter(pluginName) {
  return RestAdapter.extend({
    pathFor(store, type, findArgs) {
      return "/admin/plugins/" + pluginName + this._super(store, type, findArgs);
    }
  });
}