neli | Rust type safe netlink library

I have 2 classes - "Student" and "Employee" which both extends class Person. All 3 classes have methods inside them. In my demo class I have to create 2 objects from each class (Student, Employee and Person) and to put them in array of type Person. Then I have to go through the array and depending if the object is from Student, Employee or Person, I have to call a method within this class/subclass. The problem is that once those object go in the array of Person, only the .methods from class Person are visible. How can I make my array[i]."method" be found if it is from Student or Employee (array[i].showStudentInfo() and array[i].showEmplyeeInfo()) Thank you in advance!

My data set

I am trying to filter file data into good and bad data per the date, hence will get 2 result files. From test file, first 4 lines need to go in good data and last 2 lines in bad data.

I am having 2 issues

1. I am not getting any good data, result file is empty

2. and bad data result looks like following - picking up the name characters only

   (,C,h) (,J,u) (,T,h) (,J,o) (,N,e) (,B,i)

Test file