Gem::Resolver#root_dependencies

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems/resolver.rb, line 357
def root_dependencies
  deps = {}
  @needed.each do |dep|
    constraint = Gem::PubGrub::RubyGems.requirement_to_constraint(package_for(dep.name), dep.requirement)
    deps[dep.name] = deps.key?(dep.name) ? deps[dep.name].intersect(constraint) : constraint
  end
  deps
end