OOnogul
commented
4 years ago listOneToMany method in (c78a11b5830a8bc9ae8183ae44f80336f6140f73) can be considered solution to this issue.
Although, in mapRow subClassBiConsumer's instantiation requires nested class to be static, otherwise NoSuchMethodException is throwed for nested class constructors need enclosing class instance as constructor argument (https://stackoverflow.com/questions/17485297/how-to-instantiate-an-inner-class-with-reflection-in-java).
https://en.it1352.com/article/0795169701214100a584f60ea7695a41.html