class Oj::MimicDumpOption

onto that struct.
but in mimic we use a C struct to store defaults. This class creates a view
A bit hack-ish but does the trick. The JSON.dump_default_options is a Hash

def []=(key, value) 

def []=(key, value)
  case key
  when :quirks_mode
    Oj.default_options = {:quirks_mode => value}
  when :ascii_only
    Oj.default_options = {:ascii_only => value}
  end
end

def initialize() 

def initialize()
  oo = Oj.default_options
  self.store(:max_nesting, false)
  self.store(:allow_nan, true)
  self.store(:quirks_mode, oo[:quirks_mode])
  self.store(:ascii_only, (:ascii == oo[:escape_mode]))
  super
end