docs: public void marshall(MappingEntry mappingEntry, ProtocolMarshaller protocolMarshaller) {
  
          if (mappingEntry == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(mappingEntry.getSourceTable(), SOURCETABLE_BINDING);
              protocolMarshaller.marshall(mappingEntry.getSourcePath(), SOURCEPATH_BINDING);
              protocolMarshaller.marshall(mappingEntry.getSourceType(), SOURCETYPE_BINDING);
              protocolMarshaller.marshall(mappingEntry.getTargetTable(), TARGETTABLE_BINDING);
              protocolMarshaller.marshall(mappingEntry.getTargetPath(), TARGETPATH_BINDING);
              protocolMarshaller.marshall(mappingEntry.getTargetType(), TARGETTYPE_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }