Gem::Specification#add_dependency_with_type

# File tmp/rubies/ruby-4.0.0/lib/rubygems/specification.rb, line 1479
def add_dependency_with_type(dependency, type, requirements)
  requirements = if requirements.empty?
    Gem::Requirement.default
  else
    requirements.flatten
  end

  unless dependency.respond_to?(:name) &&
         dependency.respond_to?(:requirement)
    dependency = Gem::Dependency.new(dependency.to_s, requirements, type)
  end

  dependencies << dependency
end