text: // @ts-check
  //
  // ☝🏽 The line above enables type checking for this file. Various IDEs interpret
  // the @ts-check directive. It will give you helpful autocompletion on the web
  // and supported IDEs when implementing this exercise. You don't need to
  // understand types, JSDoc, or TypeScript in order to complete this JavaScript
  // exercise, and can completely ignore this comment block and directive.
  
  // 👋🏽 Hi there!
  //
  // On the JavaScript track we provide you with stubs. These stubs provide a
  // starting point to solving the exercise.
  //
  // In general, each variable/constant and each declared function will have a
  // JSDoc comment block above it, explaining what the variable/constant holds or
  // the function is supposed to accomplish.
  //
  // 💡 Often, the JSDoc comment blocks have annotations, such as @param and
  // @returns which are usually highlighted with a different color if the IDE
  // you're in recognizes them. It's these annotations that are used when
  // referring to the constant, variable, or function from somewhere else that
  // IDEs display.
  //
  // You don't need to write these yourself; it is not expected in idiomatic
  // JavaScript, but some companies and style-guides do enforce them.
  //
  // 💡 You're allowed to completely clear a stub before you get started. Often
  // we recommend using the stub, because they are already set-up correctly to
  // work with the tests, which you can find in ./lasagna.spec.js
  //
  // Good luck preparing some lasagna!
  
  /**
   * The number of minutes it takes to prepare a single layer.
   */
  const PREPARATION_MINUTES_PER_LAYER = 2;
  
  export const EXPECTED_MINUTES_IN_OVEN = 40;
  
  /**
   * Determines the number of minutes the lasagna still needs to remain in the
   * oven to be properly prepared.
   *
   * @param {number} actualMinutesInOven
   * @returns {number} the number of minutes remaining
   */
  export function remainingMinutesInOven(actualMinutesInOven) {
    return EXPECTED_MINUTES_IN_OVEN - actualMinutesInOven;
  }
  
  /**
   * Given a number of layers, determines the total preparation time.
   *
   * @param {number} numberOfLayers
   * @returns {number} the total preparation time
   */
  export function preparationTimeInMinutes(numberOfLayers) {
    return numberOfLayers * PREPARATION_MINUTES_PER_LAYER;
  }
  
  /**
   * Calculates the total working time. That is, the time to prepare all the layers
   * of lasagna, and the time already spent in the oven.
   *
   * @param {number} numberOfLayers
   * @param {number} actualMinutesInOven
   * @returns {number} the total working time
   */
  export function totalTimeInMinutes(numberOfLayers, actualMinutesInOven) {
    return preparationTimeInMinutes(numberOfLayers) + actualMinutesInOven;
  }
  