class Gem::Resolver::InstallerSet

def initialize(domain)
  super()
  @domain = domain
  @f = Gem::SpecFetcher.fetcher
  @always_install      = []
  @ignore_dependencies = false
  @ignore_installed    = false
  @local               = {}
  @local_source        = Gem::Source::Local.new
  @remote_set          = Gem::Resolver::BestSet.new
  @force               = false
  @specs               = {}
end