code: public static List<List<List<Writable>>> executeToSequence(List<List<Writable>> inputWritables,
                                                                 TransformProcess transformProcess) {
          if (!(transformProcess.getFinalSchema() instanceof SequenceSchema)) {
              throw new IllegalStateException("Cannot return non-sequence data with this method");
          }
  
          return execute(inputWritables, null, transformProcess).getSecond();
      }
docs: Execute the specified TransformProcess with the given input data<br>
  Note: this method can only be used if the TransformProcess
  starts with non-sequential data,
  but returns <it>sequence</it>
  data (after grouping or converting to a sequence as one of the steps)
  
  @param inputWritables   Input data to process
  @param transformProcess TransformProcess to execute
  @return Processed (sequence) data