# hack away at circular references!

    $chart->{component_list}->{components} = undef;
    $chart->{'contexts'}{'default'}{'range_axis'}{'parent'}{'component_list'}{'components'} = undef;
    $chart->{legend}->{component_list}->{components} = undef;
    $chart->{plot} = undef;
    $chart->{contexts}->{default} = undef;
    $chart->{legend}->{clicker} = undef;
    $chart->{marker_overlay}->{clicker} = undef;
    $chart->{title}->{layout}->{component} = undef;