package MyClassA;

use strict;
use warnings 'all';

sub new {
    my $classname = shift;
    my $self = {};
    bless($self, $classname);
    my %extras = @_;
    @$self{keys %extras} = values %extras;
    return $self;
}

sub TO_JSON {
    my $self = shift;
    return { %{$self} };
}

sub setClassB {
    my $self = shift;
    $self->{MY_CLASS_B} = shift;
}

sub getClassB {
    my $self = shift;
    return $self->{MY_CLASS_B};
}

1;