# File lib/ruby-prof/call_info.rb, line 92
    def merge_call_tree(other)
      # $stderr.puts "merging #{self}\nand #{other}"
      self.called += other.called
      add_self_time(other)
      add_wait_time(other)
      add_total_time(other)
      other.children.each do |other_kid|
        if kid = find_call(other_kid)
          # $stderr.puts "merging kids"
          kid.merge_call_tree(other_kid)
        else
          other_kid.parent = self
          children << other_kid
        end
      end
      other.children.clear
      other.target.call_infos.delete(other)
    end