package ClassA;
use Moose;
use MooseX::NonMoose;
extends 'aNonMooseClass';

has 'param2' => ( isa=>'Str', default=>'Default param2 in class A' );

sub FOREIGNBUILDARGS {
    my $class  = shift;
    my %args   = @_;
    my $param1 = exists $args{param1} ? $args{param1} : 'Default param1 in class A';

    return ( $param1 );
}