code: public void marshall(DescribeDataSourcesRequest describeDataSourcesRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (describeDataSourcesRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(describeDataSourcesRequest.getFilterVariable(), FILTERVARIABLE_BINDING);
              protocolMarshaller.marshall(describeDataSourcesRequest.getEQ(), EQ_BINDING);
              protocolMarshaller.marshall(describeDataSourcesRequest.getGT(), GT_BINDING);
              protocolMarshaller.marshall(describeDataSourcesRequest.getLT(), LT_BINDING);
              protocolMarshaller.marshall(describeDataSourcesRequest.getGE(), GE_BINDING);
              protocolMarshaller.marshall(describeDataSourcesRequest.getLE(), LE_BINDING);
              protocolMarshaller.marshall(describeDataSourcesRequest.getNE(), NE_BINDING);
              protocolMarshaller.marshall(describeDataSourcesRequest.getPrefix(), PREFIX_BINDING);
              protocolMarshaller.marshall(describeDataSourcesRequest.getSortOrder(), SORTORDER_BINDING);
              protocolMarshaller.marshall(describeDataSourcesRequest.getNextToken(), NEXTTOKEN_BINDING);
              protocolMarshaller.marshall(describeDataSourcesRequest.getLimit(), LIMIT_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.