class DEBUGGER__::Breakpoint

def to_s
  s = ''.dup
  s << " if: #{@cond}"        if defined?(@cond) && @cond
  s << " pre: #{@command[1]}" if defined?(@command) && @command && @command[1]
  s << " do: #{@command[2]}"  if defined?(@command) && @command && @command[2]
  s
end