code: @Override
      public java.util.concurrent.Future<ScanResult> scanAsync(String tableName, java.util.Map<String, Condition> scanFilter,
              com.amazonaws.handlers.AsyncHandler<ScanRequest, ScanResult> asyncHandler) {
  
          return scanAsync(new ScanRequest().withTableName(tableName).withScanFilter(scanFilter), asyncHandler);
      }
docs: Simplified method form for invoking the Scan operation with an AsyncHandler.
  
  @see #scanAsync(ScanRequest, com.amazonaws.handlers.AsyncHandler)