Function addCallback

src/middleware/index.ts:64–66

(callbacks: Callback[])

    const addCallback =
      <Callback>(callbacks: Callback[]) =>
      (callback: Callback): Middleware =>
        fluent(() => arrayPush(callbacks, callback));

    const willSetContentCallbacks: WillSetContentCallback[] = [];
    const willSetTablesCallbacks: WillSetTablesCallback[] = [];