code: public void marshall(ColumnMetadata columnMetadata, ProtocolMarshaller protocolMarshaller) {
  
          if (columnMetadata == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(columnMetadata.getArrayBaseColumnType(), ARRAYBASECOLUMNTYPE_BINDING);
              protocolMarshaller.marshall(columnMetadata.getIsAutoIncrement(), ISAUTOINCREMENT_BINDING);
              protocolMarshaller.marshall(columnMetadata.getIsCaseSensitive(), ISCASESENSITIVE_BINDING);
              protocolMarshaller.marshall(columnMetadata.getIsCurrency(), ISCURRENCY_BINDING);
              protocolMarshaller.marshall(columnMetadata.getIsSigned(), ISSIGNED_BINDING);
              protocolMarshaller.marshall(columnMetadata.getLabel(), LABEL_BINDING);
              protocolMarshaller.marshall(columnMetadata.getName(), NAME_BINDING);
              protocolMarshaller.marshall(columnMetadata.getNullable(), NULLABLE_BINDING);
              protocolMarshaller.marshall(columnMetadata.getPrecision(), PRECISION_BINDING);
              protocolMarshaller.marshall(columnMetadata.getScale(), SCALE_BINDING);
              protocolMarshaller.marshall(columnMetadata.getSchemaName(), SCHEMANAME_BINDING);
              protocolMarshaller.marshall(columnMetadata.getTableName(), TABLENAME_BINDING);
              protocolMarshaller.marshall(columnMetadata.getType(), TYPE_BINDING);
              protocolMarshaller.marshall(columnMetadata.getTypeName(), TYPENAME_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.