    # File lib/rubygems/specification.rb, line 987
        def dependent_gems
          out = []
          Gem.source_index.each do |name,gem|
            gem.dependencies.each do |dep|
              if self.satisfies_requirement?(dep) then
                sats = []
                find_all_satisfiers(dep) do |sat|
                  sats << sat
                end
                out << [gem, dep, sats]
              end
            end
          end
          out
        end