问从另一个函数java 11功能接口调用一个函数时的非法前向引用

EN

@Getter @Setter
Class Row{
  private int position;
  private String name;
  private List<Column> columns;
}

@Getter @Setter
Class Column{
  private int position;
  private String name;
  private String description;
}

@UtilityClass
class CsvUtils{

   public Function<Void, Row> getCsvRow = (nothing) -> {
        Row row = new Row();
        row.setPosition(1);
        row.setName("Student Details");

        // CE : Illegal forward reference
        List<Column> columns = getCsvColumn.apply(null);
        row.setColumns(columns);
        return row;
    };

    public Function<Void, Column> getColumn = (nothing) -> {
       Column csvColumn = new Column();
       csvColumn.setPosition(1);
       csvColumn.setName("Marks");
       return csvColumn;
    };
}