sub new { 
    my ($class,$args_for) = @_; 
    my $self = bless {} => $class;
    $self->_initialize($args_for); 
    return $self;
} 

sub new { 
    my ($class,$args_for) = @_; 
    my $self = bless {} , $class;
    $self->_initialize($args_for); 
    return $self; 
}