code: public void marshall(RelationalDatabaseParameter relationalDatabaseParameter, ProtocolMarshaller protocolMarshaller) {
  
          if (relationalDatabaseParameter == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(relationalDatabaseParameter.getAllowedValues(), ALLOWEDVALUES_BINDING);
              protocolMarshaller.marshall(relationalDatabaseParameter.getApplyMethod(), APPLYMETHOD_BINDING);
              protocolMarshaller.marshall(relationalDatabaseParameter.getApplyType(), APPLYTYPE_BINDING);
              protocolMarshaller.marshall(relationalDatabaseParameter.getDataType(), DATATYPE_BINDING);
              protocolMarshaller.marshall(relationalDatabaseParameter.getDescription(), DESCRIPTION_BINDING);
              protocolMarshaller.marshall(relationalDatabaseParameter.getIsModifiable(), ISMODIFIABLE_BINDING);
              protocolMarshaller.marshall(relationalDatabaseParameter.getParameterName(), PARAMETERNAME_BINDING);
              protocolMarshaller.marshall(relationalDatabaseParameter.getParameterValue(), PARAMETERVALUE_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.