module ActiveSupport::ExecutionContext

def set(**options)

previous value once the block exits.
Updates the execution context. If a block is given, it resets the provided keys to their 
def set(**options)
  options.symbolize_keys!
  keys = options.keys
  store = self.store
  previous_context = keys.zip(store.values_at(*keys)).to_h
  store.merge!(options)
  @after_change_callbacks.each(&:call)
  if block_given?
    begin
      yield
    ensure
      store.merge!(previous_context)
      @after_change_callbacks.each(&:call)
    end
  end
end