title: Why do we extend JpaRepository Interface and not implements it
body: <p><code>TestRepository ***extends*** JpaRespotiroy&lt;Test,Long&gt;</code></p>
  
  <p>JpaRepository is an interface. Why do we extend it and not implement it as we know in Java? As far as I know, interfaces are implemented, not extended. </p>
  
  <p>Can somebody explain to me please? </p>