public void removeTask(Theme theme, Task task) {
for (int i = 0; i < themes.size(); i++) {
if (themes.get(i).getId() == theme.getId()) {
themes.get(i).removeTask(task);
}
}
}
public void editTheme(Theme theme) {
for (int i = 0; i < themes.size(); i++) {
if (themes.get(i).getId() == theme.getId()) {
themes.set(i, theme);
}
}
}