code: @Override
      public java.util.concurrent.Future<DescribeVpnConnectionsResult> describeVpnConnectionsAsync(
              com.amazonaws.handlers.AsyncHandler<DescribeVpnConnectionsRequest, DescribeVpnConnectionsResult> asyncHandler) {
  
          return describeVpnConnectionsAsync(new DescribeVpnConnectionsRequest(), asyncHandler);
      }
docs: Simplified method form for invoking the DescribeVpnConnections operation with an AsyncHandler.
  
  @see #describeVpnConnectionsAsync(DescribeVpnConnectionsRequest, com.amazonaws.handlers.AsyncHandler)