text: export const Provider = {
    provider: null,
    defineProvider (Provider) {
      // TODO: Validate provider class
      this.provider = Provider
    },
    hasProvider () {
      return this.provider !== null
    },
    get () {
      return this.provider
    }
  }
  
  export default {
    install (Plugin) {
      Plugin.provider = Provider
    }
  }
  