src/Registrar.php
public function run()
    {
        array_map(
            function (SectionInterface $section) {
                $this->registerSection($section);
                $this->registerFields($section);
                $this->registerSettings($section);
            },
            $this->sections
        );
    }
public function run()
    {
        array_map(
            function (SectionInterface $section) {
                $this->registerSection($section);
                $this->registerFields($section);
                $this->registerSettings($section);
            },
            $this->sections
        );
    }
Register sections with WordPress.

@void