class Bundler::Resolver::SpecGroup

def for?(platform, required_ruby_version)
  if spec = @specs[platform]
    if required_ruby_version && spec.respond_to?(:required_ruby_version) && spec_required_ruby_version = spec.required_ruby_version
      spec_required_ruby_version.satisfied_by?(required_ruby_version.gem_version)
    else
      true
    end
  end
end