Gem::Source::Local#find_gem

# File tmp/rubies/ruby-3.2.0/lib/rubygems/source/local.rb, line 80
def find_gem(gem_name, version = Gem::Requirement.default, # :nodoc:
             prerelease = false)
  load_specs :complete

  found = []

  @specs.each do |n, data|
    if n.name == gem_name
      s = data[1].spec

      if version.satisfied_by?(s.version)
        if prerelease
          found << s
        elsif !s.version.prerelease? || version.prerelease?
          found << s
        end
      end
    end
  end

  found.max_by {|s| s.version }
end