title: Why in Javascript calling method is different than calling getter/setter method
body: <p>for example, here is a snippet of code</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>let myQuestion = {
    _greeting: 'Hello',
    
    sayHello() {
      console.log(this._greeting);
    },
    
    get sayHelloWithGet() {
      console.log(this._greeting);
    }
  };
  
  myQuestion.sayHello();
  myQuestion.sayHelloWithGet;</code></pre>
  </div>
  </div>
  </p>
  
  <p>Both of them did the same thing, both of them are called method, but why different usage?</p>