Artem Pavlenko

@kocio-pl - https://github.com/mapbox/windows-builds should be helpful.

@SMillerDev - `unicode_iterators` are still there but boost_1_83 re-arranged include directives e.g ``` grep -rn 'utf8_output_iterator' ../boost_1_83_0/boost ../boost_1_83_0/boost/regex/v5/icu.hpp:1199:inline utf8_output_iterator make_utf32_out(OutputIterator o, std::integral_constant const*) ../boost_1_83_0/boost/regex/v5/icu.hpp:1250:inline BaseIterator extract_output_base(const utf8_output_iterator& b) ../boost_1_83_0/boost/regex/v5/unicode_iterator.hpp:50:class utf8_output_iterator;...

https://github.com/mapnik/mapnik/tree/svg-group-render - initial group/element `opacity` implementation TODO: * [x] Unit tests * [x] Visual tests * [x] ~~Better names~~ going with `svg_group` for now. * [ ] Buffers caching logic...

```svg ```  ```svg ```  ```svg ```  ```svg ``` 

```bash `svg2png` -h ... --opacity arg top level opacity (default: 1.0) ``` `svg2png octocat.svg -o`  `svg2png octocat.svg -o --opacity=0.5` 

@mathisloge https://github.com/mapnik/mapnik/actions/runs/3553784365/jobs/5969500737 There are some unresolved symbols on Windows, could you take a look?

@mathisloge Great, thanks!

@BergWerkGIS - is it possible that while freetype2 is updated run-time still uses old DLL ? Could you verify mapnik.dll is linked to correct freetype2 via "Dependency Walker" (depends.exe), please...

@springmeyer - not so quick :) . Remember, mapnik is C++ not C !! @lightmare > Anyway, I will probably rewrite at least color::to_hex_string, karma is plain overkill for something...

@lightmare @springmeyer - I think `colour` generators don't need a `phoenix` dust, I'll take a look at simplifying.