code: @BetaApi
    public final NodeGroup getNodeGroup(String nodeGroup) {
  
      GetNodeGroupHttpRequest request =
          GetNodeGroupHttpRequest.newBuilder().setNodeGroup(nodeGroup).build();
      return getNodeGroup(request);
    }
docs: Returns the specified NodeGroup. Get a list of available NodeGroups by making a list() request.
  Note: the "nodes" field should not be used. Use nodeGroups.listNodes instead.
  
  <p>Sample code:
  
  <pre><code>
  try (NodeGroupClient nodeGroupClient = NodeGroupClient.create()) {
  ProjectZoneNodeGroupName nodeGroup = ProjectZoneNodeGroupName.of("[PROJECT]", "[ZONE]", "[NODE_GROUP]");
  NodeGroup response = nodeGroupClient.getNodeGroup(nodeGroup.toString());
  }
  </code></pre>
  
  @param nodeGroup Name of the node group to return.
  @throws com.google.api.gax.rpc.ApiException if the remote call fails