title: Parse gson hard string
body: <p>A have a hard string from Json. Example: </p>
  
  <pre><code>[
      {
          "Group1": [
              {
                  "id": "2b3b0db",
                  "name": "Ivan"
              },
              {
                  "id": "4f3b0db",
                  "name": "Lera"
              }
          ]
      },
      {
          "Group2": [
              {
                  "id": "42ae2a7",
                  "name": "Victor"
              }
          ]
      }
  ]
  </code></pre>
  
  <p>How i can parse it from Gson? Thanks!</p>