module ElasticAPM::NaivelyHashable

def naively_hashable?
  true
end

def to_h
  instance_variables.each_with_object({}) do |name, h|
    key = name.to_s.delete('@').to_sym
    value = instance_variable_get(name)
    is_hashable =
      value.respond_to?(:naively_hashable?) && value.naively_hashable?
    h[key] = is_hashable ? value.to_h : value
  end
end