package advanced; public class Parent { private String id; private String name; private java.util.List children; public Parent() { this.children = new java.util.ArrayList<>(); } public Parent(String id, String name) { this.id = id; this.name = name; this.children = new java.util.ArrayList<>(); } public void addChild(basic.Student student) { children.add(student); } public void removeChild(basic.Student student) { children.remove(student); } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public java.util.List getChildren() { return children; } public void setChildren(java.util.List children) { this.children = children; } }