This is a module that few should need to use, so if your not sure what this is you likely dont need to care. It exists to avoid copy/pasting the code between ember/embroider/ember-cli-htmlbars.
such time as it is not longer needed, or ember provides the helper itself and all versions of ember which do not have become EOL.
yarn add wrap-legacy-hbs-plugin-if-needed// ESModules
import wrapLegacyPluginIfNeeded from 'wrap-legacy-hbs-plugin-if-needed';
const wrappedIfNeededPlugin = wrapLegacyPluginIfNeeded(legacyOrModernHbsPlugin)// CJS
const { default: wrapLegacyPluginIfNeeded } = require('wrap-legacy-hbs-plugin-if-needed');
const wrappedIfNeededPlugin = wrapLegacyPluginIfNeeded(legacyOrModernHbsPlugin)