class Bundler::Graph

def initialize(env, output_file, show_version = false, show_requirements = false, output_format = "png", without = [])
  @env               = env
  @output_file       = output_file
  @show_version      = show_version
  @show_requirements = show_requirements
  @output_format     = output_format
  @without_groups    = without.map(&:to_sym)
  @groups            = []
  @relations         = Hash.new {|h, k| h[k] = Set.new }
  @node_options      = {}
  @edge_options      = {}
  _populate_relations
end