class Lumberjack::Formatter::StructuredFormatter

def call_with_references(obj, references)
  if obj.is_a?(Hash)
    with_object_reference(obj, references) do
      hash = {}
      obj.each do |name, value|
        value = call_with_references(value, references)
        hash[name.to_s] = value unless value.is_a?(RecusiveReferenceError)
      end
      hash
    end
  elsif obj.is_a?(Enumerable) && obj.respond_to?(:size) && obj.size != Float::INFINITY
    with_object_reference(obj, references) do
      array = []
      obj.each do |value|
        value = call_with_references(value, references)
        array << value unless value.is_a?(RecusiveReferenceError)
      end
      array
    end
  elsif @formatter
    @formatter.format(obj)
  else
    obj
  end
end