def require_theme_deps
      return false unless site.theme.runtime_dependencies

      site.theme.runtime_dependencies.each do |dep|
        next if dep.name == "jekyll"

        External.require_with_graceful_fail(dep.name) if plugin_allowed?(dep.name)
      end
    end
def require_theme_deps
      return false unless site.theme.runtime_dependencies

      site.theme.runtime_dependencies.each do |dep|
        next if dep.name == "jekyll"

        External.require_with_graceful_fail(dep.name) if plugin_allowed?(dep.name)
      end
    end
Require each of the runtime_dependencies specified by the theme's gemspec.

 Returns false only if no dependencies have been specified, otherwise nothing.