class Isolator::SimpleHashie

def method_missing(key, *args, &block)
  key_str = key.to_s
  if key_str.end_with?("=")
    self[key_str.tr("=")] = args.first
  else
    fetch(key_str) { super }
  end
end

def respond_to_missing?(key)
  key_str = key.to_s
  if key_str.end_with?("=")
    key?(key_str.tr("=")) || super
  else
    key?(key_str) || super
  end
end