Assets::PLUGIN_FIXED_HEADER => [
            Assets::THEME_BASE => [550 => 'plugins/fixed-header/fixedHeader.dataTables.min.css'],
            Assets::THEME_BOOTSTRAP3 => [550 => 'plugins/fixed-header/fixedHeader.bootstrap.min.css'],
            Assets::THEME_BOOTSTRAP4 => [550 => 'plugins/fixed-header/fixedHeader.bootstrap4.min.css'],
            Assets::THEME_FOUNDATION => [550 => 'plugins/fixed-header/fixedHeader.foundation.min.css'],