313      * @param string|null $color_to
319         string|null $color_to = null
321         return $this->individual_repository->chartIndisWithSources($color_from, $color_to);
366      * @param string|null $color_to
372         string|null $color_to = null
374         return $this->individual_repository->chartFamsWithSources($color_from, $color_to);
795      * @param string|null $color_to
799     public function chartMedia(string|null $color_from = null, string|null $color_to = null): string  argument
801         return $this->media_repository->chartMedia($color_from, $color_to);
947      * @param string|null $color_to
951     public function statsBirth(string|null $color_from = null, string|null $color_to = null): string  argument
953         return $this->individual_repository->statsBirth($color_from, $color_to);
1044      * @param string|null $color_to
1048     public function statsDeath(string|null $color_from = null, string|null $color_to = null): string  argument
1050         return $this->individual_repository->statsDeath($color_from, $color_to);
1466      * @param string|null $color_to
1470     public function statsMarr(string|null $color_from = null, string|null $color_to = null): string  argument
1472         return $this->family_repository->statsMarr($color_from, $color_to);
1541      * @param string|null $color_to
1545     public function statsDiv(string|null $color_from = null, string|null $color_to = null): string  argument
1547         return $this->family_repository->statsDiv($color_from, $color_to);
1974      * @param string|null $color_to
1981         string|null $color_to = null,
1984         return $this->family_repository->chartLargestFamilies($color_from, $color_to, (int) $total);
2185      * @param string|null $color_to
2192         string|null $color_to = null,
2196             ->chartCommonSurnames($color_from, $color_to, (int) $number_of_surnames);
2421      * @param string|null $color_to
2428         string|null $color_to = null,
2431 …   return $this->individual_repository->chartCommonGiven($color_from, $color_to, (int) $maxtoshow);