# File lib/puppet/indirector/catalog/puppetdb.rb, line 195
  def munge_edges(hash)
    edges = hash['edges']
    profile("Munge edges (edge count: #{edges.count})",
            [:puppetdb, :edges, :munge]) do
      edges.each do |edge|
        %w[source target].each do |vertex|
          edge[vertex] = resource_ref_to_hash(edge[vertex]) if edge[vertex].is_a?(String)
        end
        edge['relationship'] ||= 'contains'
      end

      hash
    end
  end