Gem::Dependency#matching_specs

# File tmp/rubies/ruby-3.0.5/lib/rubygems/dependency.rb, line 274
def matching_specs(platform_only = false)
  env_req = Gem.env_requirement(name)
  matches = Gem::Specification.stubs_for(name).find_all do |spec|
    requirement.satisfied_by?(spec.version) && env_req.satisfied_by?(spec.version)
  end.map(&:to_spec)

  Gem::BundlerVersionFinder.filter!(matches) if filters_bundler?

  if platform_only
    matches.reject! do |spec|
      spec.nil? || !Gem::Platform.match_spec?(spec)
    end
  end

  matches
end