class Jbuilder

def initialize(options = {})
  @attributes = {}
  @key_formatter = options.fetch(:key_formatter){ @@key_formatter ? @@key_formatter.clone : nil}
  @ignore_nil = options.fetch(:ignore_nil, @@ignore_nil)
  @deep_format_keys = options.fetch(:deep_format_keys, @@deep_format_keys)
  yield self if ::Kernel.block_given?
end